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Finding the Fourth Proportional to 932.74, 1,399.09 and 239.40

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Solution

The fourth proportional to 932.74, 1,399.09 and 239.40 is: 359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.74 : 1,399.09 = 239.40 : x
  2. Step 2: Convert to fraction form
    932.74/1,399.09 = 239.40/x
  3. Step 3: Cross multiply
    932.74x = 1,399.09 × 239.40
  4. Step 4: Simplify right side
    932.74x = 334,942.15
  5. Step 5: Solve for x
    x = 334,942.15/932.74
  6. Step 6: Final answer
    x = 359.10

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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.