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Finding the Fourth Proportional to 384.48, 575.61 and 239.22

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Solution

The fourth proportional to 384.48, 575.61 and 239.22 is: 358.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.48 : 575.61 = 239.22 : x
  2. Step 2: Convert to fraction form
    384.48/575.61 = 239.22/x
  3. Step 3: Cross multiply
    384.48x = 575.61 × 239.22
  4. Step 4: Simplify right side
    384.48x = 137,697.42
  5. Step 5: Solve for x
    x = 137,697.42/384.48
  6. Step 6: Final answer
    x = 358.14

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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.