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Finding the Fourth Proportional to 416.88, 575.28 and 239.85

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Solution

The fourth proportional to 416.88, 575.28 and 239.85 is: 330.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.88 : 575.28 = 239.85 : x
  2. Step 2: Convert to fraction form
    416.88/575.28 = 239.85/x
  3. Step 3: Cross multiply
    416.88x = 575.28 × 239.85
  4. Step 4: Simplify right side
    416.88x = 137,980.91
  5. Step 5: Solve for x
    x = 137,980.91/416.88
  6. Step 6: Final answer
    x = 330.98

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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.