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Finding the Fourth Proportional to 981.83, 1,472.76 and 251.42

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Solution

The fourth proportional to 981.83, 1,472.76 and 251.42 is: 377.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.83 : 1,472.76 = 251.42 : x
  2. Step 2: Convert to fraction form
    981.83/1,472.76 = 251.42/x
  3. Step 3: Cross multiply
    981.83x = 1,472.76 × 251.42
  4. Step 4: Simplify right side
    981.83x = 370,281.32
  5. Step 5: Solve for x
    x = 370,281.32/981.83
  6. Step 6: Final answer
    x = 377.13

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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.