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Finding the Fourth Proportional to 658.83, 908.31 and 509.69

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Solution

The fourth proportional to 658.83, 908.31 and 509.69 is: 702.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.83 : 908.31 = 509.69 : x
  2. Step 2: Convert to fraction form
    658.83/908.31 = 509.69/x
  3. Step 3: Cross multiply
    658.83x = 908.31 × 509.69
  4. Step 4: Simplify right side
    658.83x = 462,960.71
  5. Step 5: Solve for x
    x = 462,960.71/658.83
  6. Step 6: Final answer
    x = 702.70

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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.