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Finding the Fourth Proportional to 981.44, 1,472.15 and 251.01

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Solution

The fourth proportional to 981.44, 1,472.15 and 251.01 is: 376.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.44 : 1,472.15 = 251.01 : x
  2. Step 2: Convert to fraction form
    981.44/1,472.15 = 251.01/x
  3. Step 3: Cross multiply
    981.44x = 1,472.15 × 251.01
  4. Step 4: Simplify right side
    981.44x = 369,523.12
  5. Step 5: Solve for x
    x = 369,523.12/981.44
  6. Step 6: Final answer
    x = 376.51

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Double scale
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1.5x scale

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.