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Finding the Fourth Proportional to 311,542.78, 429,937.95 and 173,724.88

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Solution

The fourth proportional to 311,542.78, 429,937.95 and 173,724.88 is: 239,745.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,542.78 : 429,937.95 = 173,724.88 : x
  2. Step 2: Convert to fraction form
    311,542.78/429,937.95 = 173,724.88/x
  3. Step 3: Cross multiply
    311,542.78x = 429,937.95 × 173,724.88
  4. Step 4: Simplify right side
    311,542.78x = 74,690,918,771.20
  5. Step 5: Solve for x
    x = 74,690,918,771.20/311,542.78
  6. Step 6: Final answer
    x = 239,745.30

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1.5x scale

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.