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Finding the Fourth Proportional to 508.14, 760.39 and 439.90

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Solution

The fourth proportional to 508.14, 760.39 and 439.90 is: 658.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.14 : 760.39 = 439.90 : x
  2. Step 2: Convert to fraction form
    508.14/760.39 = 439.90/x
  3. Step 3: Cross multiply
    508.14x = 760.39 × 439.90
  4. Step 4: Simplify right side
    508.14x = 334,492.56
  5. Step 5: Solve for x
    x = 334,492.56/508.14
  6. Step 6: Final answer
    x = 658.27

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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.