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Finding the Fourth Proportional to 457.56, 631.40 and 258.39

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Solution

The fourth proportional to 457.56, 631.40 and 258.39 is: 356.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.56 : 631.40 = 258.39 : x
  2. Step 2: Convert to fraction form
    457.56/631.40 = 258.39/x
  3. Step 3: Cross multiply
    457.56x = 631.40 × 258.39
  4. Step 4: Simplify right side
    457.56x = 163,146.15
  5. Step 5: Solve for x
    x = 163,146.15/457.56
  6. Step 6: Final answer
    x = 356.56

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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.