Home / 1,397.67-1,926.80-999.22

Finding the Fourth Proportional to 1,397.67, 1,926.80 and 999.22

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Solution

The fourth proportional to 1,397.67, 1,926.80 and 999.22 is: 1,377.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.67 : 1,926.80 = 999.22 : x
  2. Step 2: Convert to fraction form
    1,397.67/1,926.80 = 999.22/x
  3. Step 3: Cross multiply
    1,397.67x = 1,926.80 × 999.22
  4. Step 4: Simplify right side
    1,397.67x = 1,925,304.18
  5. Step 5: Solve for x
    x = 1,925,304.18/1,397.67
  6. Step 6: Final answer
    x = 1,377.51

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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.