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Finding the Fourth Proportional to 981.32, 1,472.48 and 652.48

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Solution

The fourth proportional to 981.32, 1,472.48 and 652.48 is: 979.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.32 : 1,472.48 = 652.48 : x
  2. Step 2: Convert to fraction form
    981.32/1,472.48 = 652.48/x
  3. Step 3: Cross multiply
    981.32x = 1,472.48 × 652.48
  4. Step 4: Simplify right side
    981.32x = 960,763.75
  5. Step 5: Solve for x
    x = 960,763.75/981.32
  6. Step 6: Final answer
    x = 979.05

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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.