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Finding the Fourth Proportional to 318,242.28, 477,327.78 and 81,590.52

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Solution

The fourth proportional to 318,242.28, 477,327.78 and 81,590.52 is: 122,376.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,242.28 : 477,327.78 = 81,590.52 : x
  2. Step 2: Convert to fraction form
    318,242.28/477,327.78 = 81,590.52/x
  3. Step 3: Cross multiply
    318,242.28x = 477,327.78 × 81,590.52
  4. Step 4: Simplify right side
    318,242.28x = 38,945,421,780.65
  5. Step 5: Solve for x
    x = 38,945,421,780.65/318,242.28
  6. Step 6: Final answer
    x = 122,376.64

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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.