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Finding the Fourth Proportional to 318,658.40, 439,754.22 and 173,468.38

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Solution

The fourth proportional to 318,658.40, 439,754.22 and 173,468.38 is: 239,389.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,658.40 : 439,754.22 = 173,468.38 : x
  2. Step 2: Convert to fraction form
    318,658.40/439,754.22 = 173,468.38/x
  3. Step 3: Cross multiply
    318,658.40x = 439,754.22 × 173,468.38
  4. Step 4: Simplify right side
    318,658.40x = 76,283,452,141.56
  5. Step 5: Solve for x
    x = 76,283,452,141.56/318,658.40
  6. Step 6: Final answer
    x = 239,389.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.