Home / 1,397.42-2,083.28-1,331.82

Finding the Fourth Proportional to 1,397.42, 2,083.28 and 1,331.82

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Solution

The fourth proportional to 1,397.42, 2,083.28 and 1,331.82 is: 1,985.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.42 : 2,083.28 = 1,331.82 : x
  2. Step 2: Convert to fraction form
    1,397.42/2,083.28 = 1,331.82/x
  3. Step 3: Cross multiply
    1,397.42x = 2,083.28 × 1,331.82
  4. Step 4: Simplify right side
    1,397.42x = 2,774,553.97
  5. Step 5: Solve for x
    x = 2,774,553.97/1,397.42
  6. Step 6: Final answer
    x = 1,985.48

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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.