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Finding the Fourth Proportional to 318,866.08, 478,279.68 and 131,872.72

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Solution

The fourth proportional to 318,866.08, 478,279.68 and 131,872.72 is: 197,801.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,866.08 : 478,279.68 = 131,872.72 : x
  2. Step 2: Convert to fraction form
    318,866.08/478,279.68 = 131,872.72/x
  3. Step 3: Cross multiply
    318,866.08x = 478,279.68 × 131,872.72
  4. Step 4: Simplify right side
    318,866.08x = 63,072,042,322.33
  5. Step 5: Solve for x
    x = 63,072,042,322.33/318,866.08
  6. Step 6: Final answer
    x = 197,801.04

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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.