Home / 1,270.48-1,755.68-1,140.88

Finding the Fourth Proportional to 1,270.48, 1,755.68 and 1,140.88

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Solution

The fourth proportional to 1,270.48, 1,755.68 and 1,140.88 is: 1,576.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.48 : 1,755.68 = 1,140.88 : x
  2. Step 2: Convert to fraction form
    1,270.48/1,755.68 = 1,140.88/x
  3. Step 3: Cross multiply
    1,270.48x = 1,755.68 × 1,140.88
  4. Step 4: Simplify right side
    1,270.48x = 2,003,020.20
  5. Step 5: Solve for x
    x = 2,003,020.20/1,270.48
  6. Step 6: Final answer
    x = 1,576.59

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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.