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Finding the Fourth Proportional to 457,834, 686,940 and 247,223.92

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Solution

The fourth proportional to 457,834, 686,940 and 247,223.92 is: 370,937.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,834 : 686,940 = 247,223.92 : x
  2. Step 2: Convert to fraction form
    457,834/686,940 = 247,223.92/x
  3. Step 3: Cross multiply
    457,834x = 686,940 × 247,223.92
  4. Step 4: Simplify right side
    457,834x = 169,827,999,604.80
  5. Step 5: Solve for x
    x = 169,827,999,604.80/457,834
  6. Step 6: Final answer
    x = 370,937.94

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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.