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Finding the Fourth Proportional to 658.98, 913.55 and 623.87

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Solution

The fourth proportional to 658.98, 913.55 and 623.87 is: 864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.98 : 913.55 = 623.87 : x
  2. Step 2: Convert to fraction form
    658.98/913.55 = 623.87/x
  3. Step 3: Cross multiply
    658.98x = 913.55 × 623.87
  4. Step 4: Simplify right side
    658.98x = 569,933.43
  5. Step 5: Solve for x
    x = 569,933.43/658.98
  6. Step 6: Final answer
    x = 864.88

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.