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Finding the Fourth Proportional to 439.16, 658.64 and 207.83

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Solution

The fourth proportional to 439.16, 658.64 and 207.83 is: 311.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.16 : 658.64 = 207.83 : x
  2. Step 2: Convert to fraction form
    439.16/658.64 = 207.83/x
  3. Step 3: Cross multiply
    439.16x = 658.64 × 207.83
  4. Step 4: Simplify right side
    439.16x = 136,885.15
  5. Step 5: Solve for x
    x = 136,885.15/439.16
  6. Step 6: Final answer
    x = 311.70

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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.