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Finding the Fourth Proportional to 872.20, 1,204.70 and 652.13

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Solution

The fourth proportional to 872.20, 1,204.70 and 652.13 is: 900.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.20 : 1,204.70 = 652.13 : x
  2. Step 2: Convert to fraction form
    872.20/1,204.70 = 652.13/x
  3. Step 3: Cross multiply
    872.20x = 1,204.70 × 652.13
  4. Step 4: Simplify right side
    872.20x = 785,614.99
  5. Step 5: Solve for x
    x = 785,614.99/872.20
  6. Step 6: Final answer
    x = 900.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.