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Finding the Fourth Proportional to 384.46, 575.80 and 239.87

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Solution

The fourth proportional to 384.46, 575.80 and 239.87 is: 359.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.46 : 575.80 = 239.87 : x
  2. Step 2: Convert to fraction form
    384.46/575.80 = 239.87/x
  3. Step 3: Cross multiply
    384.46x = 575.80 × 239.87
  4. Step 4: Simplify right side
    384.46x = 138,117.15
  5. Step 5: Solve for x
    x = 138,117.15/384.46
  6. Step 6: Final answer
    x = 359.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.