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Finding the Fourth Proportional to 487,381.20, 731,071.80 and 487,381.20

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Solution

The fourth proportional to 487,381.20, 731,071.80 and 487,381.20 is: 731,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,381.20 : 731,071.80 = 487,381.20 : x
  2. Step 2: Convert to fraction form
    487,381.20/731,071.80 = 487,381.20/x
  3. Step 3: Cross multiply
    487,381.20x = 731,071.80 × 487,381.20
  4. Step 4: Simplify right side
    487,381.20x = 356,310,651,170.16
  5. Step 5: Solve for x
    x = 356,310,651,170.16/487,381.20
  6. Step 6: Final answer
    x = 731,071.80

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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.