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Finding the Fourth Proportional to 1,102.20, 1,652.76 and 553.56

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Solution

The fourth proportional to 1,102.20, 1,652.76 and 553.56 is: 830.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.20 : 1,652.76 = 553.56 : x
  2. Step 2: Convert to fraction form
    1,102.20/1,652.76 = 553.56/x
  3. Step 3: Cross multiply
    1,102.20x = 1,652.76 × 553.56
  4. Step 4: Simplify right side
    1,102.20x = 914,901.83
  5. Step 5: Solve for x
    x = 914,901.83/1,102.20
  6. Step 6: Final answer
    x = 830.07

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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.