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Finding the Fourth Proportional to 487,474.40, 731,211.60 and 455,981.60

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Solution

The fourth proportional to 487,474.40, 731,211.60 and 455,981.60 is: 683,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,474.40 : 731,211.60 = 455,981.60 : x
  2. Step 2: Convert to fraction form
    487,474.40/731,211.60 = 455,981.60/x
  3. Step 3: Cross multiply
    487,474.40x = 731,211.60 × 455,981.60
  4. Step 4: Simplify right side
    487,474.40x = 333,419,035,306.56
  5. Step 5: Solve for x
    x = 333,419,035,306.56/487,474.40
  6. Step 6: Final answer
    x = 683,972.40

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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.