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Finding the Fourth Proportional to 318,115.17, 477,178.91 and 254,640.69

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Solution

The fourth proportional to 318,115.17, 477,178.91 and 254,640.69 is: 381,965.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,115.17 : 477,178.91 = 254,640.69 : x
  2. Step 2: Convert to fraction form
    318,115.17/477,178.91 = 254,640.69/x
  3. Step 3: Cross multiply
    318,115.17x = 477,178.91 × 254,640.69
  4. Step 4: Simplify right side
    318,115.17x = 121,509,166,895.85
  5. Step 5: Solve for x
    x = 121,509,166,895.85/318,115.17
  6. Step 6: Final answer
    x = 381,965.96

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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.