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Finding the Fourth Proportional to 487,809.40, 731,714.10 and 155,385.40

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Solution

The fourth proportional to 487,809.40, 731,714.10 and 155,385.40 is: 233,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,809.40 : 731,714.10 = 155,385.40 : x
  2. Step 2: Convert to fraction form
    487,809.40/731,714.10 = 155,385.40/x
  3. Step 3: Cross multiply
    487,809.40x = 731,714.10 × 155,385.40
  4. Step 4: Simplify right side
    487,809.40x = 113,697,688,114.14
  5. Step 5: Solve for x
    x = 113,697,688,114.14/487,809.40
  6. Step 6: Final answer
    x = 233,078.10

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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.