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Finding the Fourth Proportional to 457.46, 630.69 and 395.16

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Solution

The fourth proportional to 457.46, 630.69 and 395.16 is: 544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.46 : 630.69 = 395.16 : x
  2. Step 2: Convert to fraction form
    457.46/630.69 = 395.16/x
  3. Step 3: Cross multiply
    457.46x = 630.69 × 395.16
  4. Step 4: Simplify right side
    457.46x = 249,223.46
  5. Step 5: Solve for x
    x = 249,223.46/457.46
  6. Step 6: Final answer
    x = 544.80

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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.