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Finding the Fourth Proportional to 1,580.91, 2,371.28 and 485.27

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Solution

The fourth proportional to 1,580.91, 2,371.28 and 485.27 is: 727.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.91 : 2,371.28 = 485.27 : x
  2. Step 2: Convert to fraction form
    1,580.91/2,371.28 = 485.27/x
  3. Step 3: Cross multiply
    1,580.91x = 2,371.28 × 485.27
  4. Step 4: Simplify right side
    1,580.91x = 1,150,714.55
  5. Step 5: Solve for x
    x = 1,150,714.55/1,580.91
  6. Step 6: Final answer
    x = 727.88

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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.