Home / 1,238.17-1,720.39-1,225.33

Finding the Fourth Proportional to 1,238.17, 1,720.39 and 1,225.33

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Solution

The fourth proportional to 1,238.17, 1,720.39 and 1,225.33 is: 1,702.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.17 : 1,720.39 = 1,225.33 : x
  2. Step 2: Convert to fraction form
    1,238.17/1,720.39 = 1,225.33/x
  3. Step 3: Cross multiply
    1,238.17x = 1,720.39 × 1,225.33
  4. Step 4: Simplify right side
    1,238.17x = 2,108,045.48
  5. Step 5: Solve for x
    x = 2,108,045.48/1,238.17
  6. Step 6: Final answer
    x = 1,702.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.