Home / 747,809.40-1,121,714.10-665,140.80

Finding the Fourth Proportional to 747,809.40, 1,121,714.10 and 665,140.80

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Solution

The fourth proportional to 747,809.40, 1,121,714.10 and 665,140.80 is: 997,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,809.40 : 1,121,714.10 = 665,140.80 : x
  2. Step 2: Convert to fraction form
    747,809.40/1,121,714.10 = 665,140.80/x
  3. Step 3: Cross multiply
    747,809.40x = 1,121,714.10 × 665,140.80
  4. Step 4: Simplify right side
    747,809.40x = 746,097,813,845.28
  5. Step 5: Solve for x
    x = 746,097,813,845.28/747,809.40
  6. Step 6: Final answer
    x = 997,711.20

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.