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Finding the Fourth Proportional to 408.93, 613.53 and 291.89

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Solution

The fourth proportional to 408.93, 613.53 and 291.89 is: 437.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.93 : 613.53 = 291.89 : x
  2. Step 2: Convert to fraction form
    408.93/613.53 = 291.89/x
  3. Step 3: Cross multiply
    408.93x = 613.53 × 291.89
  4. Step 4: Simplify right side
    408.93x = 179,080.20
  5. Step 5: Solve for x
    x = 179,080.20/408.93
  6. Step 6: Final answer
    x = 437.92

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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.