Home / 1,425.80-1,967.96-1,278.18

Finding the Fourth Proportional to 1,425.80, 1,967.96 and 1,278.18

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Solution

The fourth proportional to 1,425.80, 1,967.96 and 1,278.18 is: 1,764.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.80 : 1,967.96 = 1,278.18 : x
  2. Step 2: Convert to fraction form
    1,425.80/1,967.96 = 1,278.18/x
  3. Step 3: Cross multiply
    1,425.80x = 1,967.96 × 1,278.18
  4. Step 4: Simplify right side
    1,425.80x = 2,515,407.11
  5. Step 5: Solve for x
    x = 2,515,407.11/1,425.80
  6. Step 6: Final answer
    x = 1,764.21

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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.