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Finding the Fourth Proportional to 1,872.80, 2,808.96 and 574.40

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Solution

The fourth proportional to 1,872.80, 2,808.96 and 574.40 is: 861.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.80 : 2,808.96 = 574.40 : x
  2. Step 2: Convert to fraction form
    1,872.80/2,808.96 = 574.40/x
  3. Step 3: Cross multiply
    1,872.80x = 2,808.96 × 574.40
  4. Step 4: Simplify right side
    1,872.80x = 1,613,466.62
  5. Step 5: Solve for x
    x = 1,613,466.62/1,872.80
  6. Step 6: Final answer
    x = 861.53

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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.