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Finding the Fourth Proportional to 399.62, 600.65 and 291.89

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Solution

The fourth proportional to 399.62, 600.65 and 291.89 is: 438.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.62 : 600.65 = 291.89 : x
  2. Step 2: Convert to fraction form
    399.62/600.65 = 291.89/x
  3. Step 3: Cross multiply
    399.62x = 600.65 × 291.89
  4. Step 4: Simplify right side
    399.62x = 175,323.73
  5. Step 5: Solve for x
    x = 175,323.73/399.62
  6. Step 6: Final answer
    x = 438.73

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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.