Home / 1,121,010,740.45-1,547,041,819.85-644,701,481.21

Finding the Fourth Proportional to 1,121,010,740.45, 1,547,041,819.85 and 644,701,481.21

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Solution

The fourth proportional to 1,121,010,740.45, 1,547,041,819.85 and 644,701,481.21 is: 889,715,072.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,010,740.45 : 1,547,041,819.85 = 644,701,481.21 : x
  2. Step 2: Convert to fraction form
    1,121,010,740.45/1,547,041,819.85 = 644,701,481.21/x
  3. Step 3: Cross multiply
    1,121,010,740.45x = 1,547,041,819.85 × 644,701,481.21
  4. Step 4: Simplify right side
    1,121,010,740.45x = 997,380,152,751,108,992
  5. Step 5: Solve for x
    x = 997,380,152,751,108,992/1,121,010,740.45
  6. Step 6: Final answer
    x = 889,715,072.98

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.