Home / 318,438.72-477,716.40-131,348.16

Finding the Fourth Proportional to 318,438.72, 477,716.40 and 131,348.16

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Solution

The fourth proportional to 318,438.72, 477,716.40 and 131,348.16 is: 197,046.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,438.72 : 477,716.40 = 131,348.16 : x
  2. Step 2: Convert to fraction form
    318,438.72/477,716.40 = 131,348.16/x
  3. Step 3: Cross multiply
    318,438.72x = 477,716.40 × 131,348.16
  4. Step 4: Simplify right side
    318,438.72x = 62,747,170,141.82
  5. Step 5: Solve for x
    x = 62,747,170,141.82/318,438.72
  6. Step 6: Final answer
    x = 197,046.30

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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.