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Finding the Fourth Proportional to 1,872.88, 2,809.35 and 574.31

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Solution

The fourth proportional to 1,872.88, 2,809.35 and 574.31 is: 861.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.88 : 2,809.35 = 574.31 : x
  2. Step 2: Convert to fraction form
    1,872.88/2,809.35 = 574.31/x
  3. Step 3: Cross multiply
    1,872.88x = 2,809.35 × 574.31
  4. Step 4: Simplify right side
    1,872.88x = 1,613,444.82
  5. Step 5: Solve for x
    x = 1,613,444.82/1,872.88
  6. Step 6: Final answer
    x = 861.48

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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.