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Finding the Fourth Proportional to 318,808.88, 478,324 and 141,440.42

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Solution

The fourth proportional to 318,808.88, 478,324 and 141,440.42 is: 212,209.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,808.88 : 478,324 = 141,440.42 : x
  2. Step 2: Convert to fraction form
    318,808.88/478,324 = 141,440.42/x
  3. Step 3: Cross multiply
    318,808.88x = 478,324 × 141,440.42
  4. Step 4: Simplify right side
    318,808.88x = 67,654,347,456.08
  5. Step 5: Solve for x
    x = 67,654,347,456.08/318,808.88
  6. Step 6: Final answer
    x = 212,209.73

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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.