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Finding the Fourth Proportional to 1,122.30, 1,682.10 and 574.62

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Solution

The fourth proportional to 1,122.30, 1,682.10 and 574.62 is: 861.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.30 : 1,682.10 = 574.62 : x
  2. Step 2: Convert to fraction form
    1,122.30/1,682.10 = 574.62/x
  3. Step 3: Cross multiply
    1,122.30x = 1,682.10 × 574.62
  4. Step 4: Simplify right side
    1,122.30x = 966,568.30
  5. Step 5: Solve for x
    x = 966,568.30/1,122.30
  6. Step 6: Final answer
    x = 861.24

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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.