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Finding the Fourth Proportional to 1,872.57, 2,809.40 and 574.23

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Solution

The fourth proportional to 1,872.57, 2,809.40 and 574.23 is: 861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.57 : 2,809.40 = 574.23 : x
  2. Step 2: Convert to fraction form
    1,872.57/2,809.40 = 574.23/x
  3. Step 3: Cross multiply
    1,872.57x = 2,809.40 × 574.23
  4. Step 4: Simplify right side
    1,872.57x = 1,613,238.89
  5. Step 5: Solve for x
    x = 1,613,238.89/1,872.57
  6. Step 6: Final answer
    x = 861.51

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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.