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Finding the Fourth Proportional to 1,057.54, 1,586.31 and 480.58

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Solution

The fourth proportional to 1,057.54, 1,586.31 and 480.58 is: 720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.54 : 1,586.31 = 480.58 : x
  2. Step 2: Convert to fraction form
    1,057.54/1,586.31 = 480.58/x
  3. Step 3: Cross multiply
    1,057.54x = 1,586.31 × 480.58
  4. Step 4: Simplify right side
    1,057.54x = 762,348.86
  5. Step 5: Solve for x
    x = 762,348.86/1,057.54
  6. Step 6: Final answer
    x = 720.87

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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.