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Finding the Fourth Proportional to 417.20, 575.72 and 242.54

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Solution

The fourth proportional to 417.20, 575.72 and 242.54 is: 334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.20 : 575.72 = 242.54 : x
  2. Step 2: Convert to fraction form
    417.20/575.72 = 242.54/x
  3. Step 3: Cross multiply
    417.20x = 575.72 × 242.54
  4. Step 4: Simplify right side
    417.20x = 139,635.13
  5. Step 5: Solve for x
    x = 139,635.13/417.20
  6. Step 6: Final answer
    x = 334.70

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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.