Home / 1,471.20-2,029.56-911.52

Finding the Fourth Proportional to 1,471.20, 2,029.56 and 911.52

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Solution

The fourth proportional to 1,471.20, 2,029.56 and 911.52 is: 1,257.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.20 : 2,029.56 = 911.52 : x
  2. Step 2: Convert to fraction form
    1,471.20/2,029.56 = 911.52/x
  3. Step 3: Cross multiply
    1,471.20x = 2,029.56 × 911.52
  4. Step 4: Simplify right side
    1,471.20x = 1,849,984.53
  5. Step 5: Solve for x
    x = 1,849,984.53/1,471.20
  6. Step 6: Final answer
    x = 1,257.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.