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Finding the Fourth Proportional to 457.80, 632.28 and 310.18

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Solution

The fourth proportional to 457.80, 632.28 and 310.18 is: 428.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.80 : 632.28 = 310.18 : x
  2. Step 2: Convert to fraction form
    457.80/632.28 = 310.18/x
  3. Step 3: Cross multiply
    457.80x = 632.28 × 310.18
  4. Step 4: Simplify right side
    457.80x = 196,123.16
  5. Step 5: Solve for x
    x = 196,123.16/457.80
  6. Step 6: Final answer
    x = 428.40

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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.