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Finding the Fourth Proportional to 458.86, 691.44 and 379.48

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Solution

The fourth proportional to 458.86, 691.44 and 379.48 is: 571.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.86 : 691.44 = 379.48 : x
  2. Step 2: Convert to fraction form
    458.86/691.44 = 379.48/x
  3. Step 3: Cross multiply
    458.86x = 691.44 × 379.48
  4. Step 4: Simplify right side
    458.86x = 262,387.65
  5. Step 5: Solve for x
    x = 262,387.65/458.86
  6. Step 6: Final answer
    x = 571.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.