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Finding the Fourth Proportional to 458.30, 632.45 and 251.30

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Solution

The fourth proportional to 458.30, 632.45 and 251.30 is: 346.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.30 : 632.45 = 251.30 : x
  2. Step 2: Convert to fraction form
    458.30/632.45 = 251.30/x
  3. Step 3: Cross multiply
    458.30x = 632.45 × 251.30
  4. Step 4: Simplify right side
    458.30x = 158,932.15
  5. Step 5: Solve for x
    x = 158,932.15/458.30
  6. Step 6: Final answer
    x = 346.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.