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Finding the Fourth Proportional to 487,639.80, 731,459.70 and 155,249.40

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Solution

The fourth proportional to 487,639.80, 731,459.70 and 155,249.40 is: 232,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,639.80 : 731,459.70 = 155,249.40 : x
  2. Step 2: Convert to fraction form
    487,639.80/731,459.70 = 155,249.40/x
  3. Step 3: Cross multiply
    487,639.80x = 731,459.70 × 155,249.40
  4. Step 4: Simplify right side
    487,639.80x = 113,558,679,549.18
  5. Step 5: Solve for x
    x = 113,558,679,549.18/487,639.80
  6. Step 6: Final answer
    x = 232,874.10

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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.