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Finding the Fourth Proportional to 340.90, 511.18 and 158.42

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Solution

The fourth proportional to 340.90, 511.18 and 158.42 is: 237.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.90 : 511.18 = 158.42 : x
  2. Step 2: Convert to fraction form
    340.90/511.18 = 158.42/x
  3. Step 3: Cross multiply
    340.90x = 511.18 × 158.42
  4. Step 4: Simplify right side
    340.90x = 80,982.02
  5. Step 5: Solve for x
    x = 80,982.02/340.90
  6. Step 6: Final answer
    x = 237.56

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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.