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Finding the Fourth Proportional to 627,432, 865,972.80 and 359,160

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Solution

The fourth proportional to 627,432, 865,972.80 and 359,160 is: 495,707.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,432 : 865,972.80 = 359,160 : x
  2. Step 2: Convert to fraction form
    627,432/865,972.80 = 359,160/x
  3. Step 3: Cross multiply
    627,432x = 865,972.80 × 359,160
  4. Step 4: Simplify right side
    627,432x = 311,022,790,848
  5. Step 5: Solve for x
    x = 311,022,790,848/627,432
  6. Step 6: Final answer
    x = 495,707.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.