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Finding the Fourth Proportional to 417.12, 574.88 and 339.36

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Solution

The fourth proportional to 417.12, 574.88 and 339.36 is: 467.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.12 : 574.88 = 339.36 : x
  2. Step 2: Convert to fraction form
    417.12/574.88 = 339.36/x
  3. Step 3: Cross multiply
    417.12x = 574.88 × 339.36
  4. Step 4: Simplify right side
    417.12x = 195,091.28
  5. Step 5: Solve for x
    x = 195,091.28/417.12
  6. Step 6: Final answer
    x = 467.71

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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.