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Finding the Fourth Proportional to 380.79, 572.40 and 237.42

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Solution

The fourth proportional to 380.79, 572.40 and 237.42 is: 356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.79 : 572.40 = 237.42 : x
  2. Step 2: Convert to fraction form
    380.79/572.40 = 237.42/x
  3. Step 3: Cross multiply
    380.79x = 572.40 × 237.42
  4. Step 4: Simplify right side
    380.79x = 135,899.21
  5. Step 5: Solve for x
    x = 135,899.21/380.79
  6. Step 6: Final answer
    x = 356.89

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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.