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Finding the Fourth Proportional to 318,862.38, 478,300.80 and 119,073.78

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Solution

The fourth proportional to 318,862.38, 478,300.80 and 119,073.78 is: 178,613.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,862.38 : 478,300.80 = 119,073.78 : x
  2. Step 2: Convert to fraction form
    318,862.38/478,300.80 = 119,073.78/x
  3. Step 3: Cross multiply
    318,862.38x = 478,300.80 × 119,073.78
  4. Step 4: Simplify right side
    318,862.38x = 56,953,084,233.02
  5. Step 5: Solve for x
    x = 56,953,084,233.02/318,862.38
  6. Step 6: Final answer
    x = 178,613.37

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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.