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Finding the Fourth Proportional to 478,391.12, 717,337.53 and 178,625.17

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Solution

The fourth proportional to 478,391.12, 717,337.53 and 178,625.17 is: 267,844.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,391.12 : 717,337.53 = 178,625.17 : x
  2. Step 2: Convert to fraction form
    478,391.12/717,337.53 = 178,625.17/x
  3. Step 3: Cross multiply
    478,391.12x = 717,337.53 × 178,625.17
  4. Step 4: Simplify right side
    478,391.12x = 128,134,538,243.63
  5. Step 5: Solve for x
    x = 128,134,538,243.63/478,391.12
  6. Step 6: Final answer
    x = 267,844.73

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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.