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Finding the Fourth Proportional to 417.95, 576.49 and 355.53

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Solution

The fourth proportional to 417.95, 576.49 and 355.53 is: 490.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.95 : 576.49 = 355.53 : x
  2. Step 2: Convert to fraction form
    417.95/576.49 = 355.53/x
  3. Step 3: Cross multiply
    417.95x = 576.49 × 355.53
  4. Step 4: Simplify right side
    417.95x = 204,958.60
  5. Step 5: Solve for x
    x = 204,958.60/417.95
  6. Step 6: Final answer
    x = 490.39

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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.