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Finding the Fourth Proportional to 454.72, 626.88 and 417.28

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Solution

The fourth proportional to 454.72, 626.88 and 417.28 is: 575.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.72 : 626.88 = 417.28 : x
  2. Step 2: Convert to fraction form
    454.72/626.88 = 417.28/x
  3. Step 3: Cross multiply
    454.72x = 626.88 × 417.28
  4. Step 4: Simplify right side
    454.72x = 261,584.49
  5. Step 5: Solve for x
    x = 261,584.49/454.72
  6. Step 6: Final answer
    x = 575.26

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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.