Home / 1,147.48-1,721.19-281.80

Finding the Fourth Proportional to 1,147.48, 1,721.19 and 281.80

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Solution

The fourth proportional to 1,147.48, 1,721.19 and 281.80 is: 422.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.48 : 1,721.19 = 281.80 : x
  2. Step 2: Convert to fraction form
    1,147.48/1,721.19 = 281.80/x
  3. Step 3: Cross multiply
    1,147.48x = 1,721.19 × 281.80
  4. Step 4: Simplify right side
    1,147.48x = 485,031.34
  5. Step 5: Solve for x
    x = 485,031.34/1,147.48
  6. Step 6: Final answer
    x = 422.69

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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.