Home / 1,207,129,378.32-1,809,404,962.20-688,442,962.32

Finding the Fourth Proportional to 1,207,129,378.32, 1,809,404,962.20 and 688,442,962.32

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Solution

The fourth proportional to 1,207,129,378.32, 1,809,404,962.20 and 688,442,962.32 is: 1,031,929,248.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,129,378.32 : 1,809,404,962.20 = 688,442,962.32 : x
  2. Step 2: Convert to fraction form
    1,207,129,378.32/1,809,404,962.20 = 688,442,962.32/x
  3. Step 3: Cross multiply
    1,207,129,378.32x = 1,809,404,962.20 × 688,442,962.32
  4. Step 4: Simplify right side
    1,207,129,378.32x = 1,245,672,112,213,475,840
  5. Step 5: Solve for x
    x = 1,245,672,112,213,475,840/1,207,129,378.32
  6. Step 6: Final answer
    x = 1,031,929,248.50

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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.