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Finding the Fourth Proportional to 614.50, 921.75 and 158.50

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Solution

The fourth proportional to 614.50, 921.75 and 158.50 is: 237.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.50 : 921.75 = 158.50 : x
  2. Step 2: Convert to fraction form
    614.50/921.75 = 158.50/x
  3. Step 3: Cross multiply
    614.50x = 921.75 × 158.50
  4. Step 4: Simplify right side
    614.50x = 146,097.38
  5. Step 5: Solve for x
    x = 146,097.38/614.50
  6. Step 6: Final answer
    x = 237.75

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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.