Home / 1,287,443,137.16-1,928,349,144.03-912,815,456.73

Finding the Fourth Proportional to 1,287,443,137.16, 1,928,349,144.03 and 912,815,456.73

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Solution

The fourth proportional to 1,287,443,137.16, 1,928,349,144.03 and 912,815,456.73 is: 1,367,226,911.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,443,137.16 : 1,928,349,144.03 = 912,815,456.73 : x
  2. Step 2: Convert to fraction form
    1,287,443,137.16/1,928,349,144.03 = 912,815,456.73/x
  3. Step 3: Cross multiply
    1,287,443,137.16x = 1,928,349,144.03 × 912,815,456.73
  4. Step 4: Simplify right side
    1,287,443,137.16x = 1,760,226,904,642,649,088
  5. Step 5: Solve for x
    x = 1,760,226,904,642,649,088/1,287,443,137.16
  6. Step 6: Final answer
    x = 1,367,226,911.88

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.