Home / 1,355.29-2,020.10-1,255.42

Finding the Fourth Proportional to 1,355.29, 2,020.10 and 1,255.42

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Solution

The fourth proportional to 1,355.29, 2,020.10 and 1,255.42 is: 1,871.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.29 : 2,020.10 = 1,255.42 : x
  2. Step 2: Convert to fraction form
    1,355.29/2,020.10 = 1,255.42/x
  3. Step 3: Cross multiply
    1,355.29x = 2,020.10 × 1,255.42
  4. Step 4: Simplify right side
    1,355.29x = 2,536,079.40
  5. Step 5: Solve for x
    x = 2,536,079.40/1,355.29
  6. Step 6: Final answer
    x = 1,871.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.