Home / 1,207,129,412.32-1,809,405,013.20-688,442,996.32

Finding the Fourth Proportional to 1,207,129,412.32, 1,809,405,013.20 and 688,442,996.32

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Solution

The fourth proportional to 1,207,129,412.32, 1,809,405,013.20 and 688,442,996.32 is: 1,031,929,299.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,129,412.32 : 1,809,405,013.20 = 688,442,996.32 : x
  2. Step 2: Convert to fraction form
    1,207,129,412.32/1,809,405,013.20 = 688,442,996.32/x
  3. Step 3: Cross multiply
    1,207,129,412.32x = 1,809,405,013.20 × 688,442,996.32
  4. Step 4: Simplify right side
    1,207,129,412.32x = 1,245,672,208,843,837,184
  5. Step 5: Solve for x
    x = 1,245,672,208,843,837,184/1,207,129,412.32
  6. Step 6: Final answer
    x = 1,031,929,299.49

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Double scale
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1.5x scale

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.