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Finding the Fourth Proportional to 239.40, 358.56 and 117.54

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Solution

The fourth proportional to 239.40, 358.56 and 117.54 is: 176.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.40 : 358.56 = 117.54 : x
  2. Step 2: Convert to fraction form
    239.40/358.56 = 117.54/x
  3. Step 3: Cross multiply
    239.40x = 358.56 × 117.54
  4. Step 4: Simplify right side
    239.40x = 42,145.14
  5. Step 5: Solve for x
    x = 42,145.14/239.40
  6. Step 6: Final answer
    x = 176.04

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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.