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Finding the Fourth Proportional to 1,057.67, 1,587.07 and 441.42

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Solution

The fourth proportional to 1,057.67, 1,587.07 and 441.42 is: 662.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.67 : 1,587.07 = 441.42 : x
  2. Step 2: Convert to fraction form
    1,057.67/1,587.07 = 441.42/x
  3. Step 3: Cross multiply
    1,057.67x = 1,587.07 × 441.42
  4. Step 4: Simplify right side
    1,057.67x = 700,568.41
  5. Step 5: Solve for x
    x = 700,568.41/1,057.67
  6. Step 6: Final answer
    x = 662.37

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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.