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Finding the Fourth Proportional to 318,916.61, 478,385.91 and 168,954.02

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Solution

The fourth proportional to 318,916.61, 478,385.91 and 168,954.02 is: 253,436.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,916.61 : 478,385.91 = 168,954.02 : x
  2. Step 2: Convert to fraction form
    318,916.61/478,385.91 = 168,954.02/x
  3. Step 3: Cross multiply
    318,916.61x = 478,385.91 × 168,954.02
  4. Step 4: Simplify right side
    318,916.61x = 80,825,222,605.86
  5. Step 5: Solve for x
    x = 80,825,222,605.86/318,916.61
  6. Step 6: Final answer
    x = 253,436.85

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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.