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Finding the Fourth Proportional to 642.01, 964.89 and 437.89

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Solution

The fourth proportional to 642.01, 964.89 and 437.89 is: 658.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.01 : 964.89 = 437.89 : x
  2. Step 2: Convert to fraction form
    642.01/964.89 = 437.89/x
  3. Step 3: Cross multiply
    642.01x = 964.89 × 437.89
  4. Step 4: Simplify right side
    642.01x = 422,515.68
  5. Step 5: Solve for x
    x = 422,515.68/642.01
  6. Step 6: Final answer
    x = 658.11

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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.