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Finding the Fourth Proportional to 318,679.28, 478,043.40 and 82,024.28

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Solution

The fourth proportional to 318,679.28, 478,043.40 and 82,024.28 is: 123,042.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,679.28 : 478,043.40 = 82,024.28 : x
  2. Step 2: Convert to fraction form
    318,679.28/478,043.40 = 82,024.28/x
  3. Step 3: Cross multiply
    318,679.28x = 478,043.40 × 82,024.28
  4. Step 4: Simplify right side
    318,679.28x = 39,211,165,693.75
  5. Step 5: Solve for x
    x = 39,211,165,693.75/318,679.28
  6. Step 6: Final answer
    x = 123,042.72

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1.5x scale

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.