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Finding the Fourth Proportional to 456.03, 628.56 and 397.71

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Solution

The fourth proportional to 456.03, 628.56 and 397.71 is: 548.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.03 : 628.56 = 397.71 : x
  2. Step 2: Convert to fraction form
    456.03/628.56 = 397.71/x
  3. Step 3: Cross multiply
    456.03x = 628.56 × 397.71
  4. Step 4: Simplify right side
    456.03x = 249,984.60
  5. Step 5: Solve for x
    x = 249,984.60/456.03
  6. Step 6: Final answer
    x = 548.18

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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.