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Finding the Fourth Proportional to 853.79, 1,280.66 and 237.48

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Solution

The fourth proportional to 853.79, 1,280.66 and 237.48 is: 356.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.79 : 1,280.66 = 237.48 : x
  2. Step 2: Convert to fraction form
    853.79/1,280.66 = 237.48/x
  3. Step 3: Cross multiply
    853.79x = 1,280.66 × 237.48
  4. Step 4: Simplify right side
    853.79x = 304,123.55
  5. Step 5: Solve for x
    x = 304,123.55/853.79
  6. Step 6: Final answer
    x = 356.21

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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.