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Finding the Fourth Proportional to 453.55, 625.17 and 355.15

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Solution

The fourth proportional to 453.55, 625.17 and 355.15 is: 489.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.55 : 625.17 = 355.15 : x
  2. Step 2: Convert to fraction form
    453.55/625.17 = 355.15/x
  3. Step 3: Cross multiply
    453.55x = 625.17 × 355.15
  4. Step 4: Simplify right side
    453.55x = 222,029.13
  5. Step 5: Solve for x
    x = 222,029.13/453.55
  6. Step 6: Final answer
    x = 489.54

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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.