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Finding the Fourth Proportional to 656,156, 905,495.28 and 354,350

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Solution

The fourth proportional to 656,156, 905,495.28 and 354,350 is: 489,003

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,156 : 905,495.28 = 354,350 : x
  2. Step 2: Convert to fraction form
    656,156/905,495.28 = 354,350/x
  3. Step 3: Cross multiply
    656,156x = 905,495.28 × 354,350
  4. Step 4: Simplify right side
    656,156x = 320,862,252,468
  5. Step 5: Solve for x
    x = 320,862,252,468/656,156
  6. Step 6: Final answer
    x = 489,003

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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.