Home / 2,261.34-3,121.20-1,377.90

Finding the Fourth Proportional to 2,261.34, 3,121.20 and 1,377.90

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Solution

The fourth proportional to 2,261.34, 3,121.20 and 1,377.90 is: 1,901.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.34 : 3,121.20 = 1,377.90 : x
  2. Step 2: Convert to fraction form
    2,261.34/3,121.20 = 1,377.90/x
  3. Step 3: Cross multiply
    2,261.34x = 3,121.20 × 1,377.90
  4. Step 4: Simplify right side
    2,261.34x = 4,300,701.48
  5. Step 5: Solve for x
    x = 4,300,701.48/2,261.34
  6. Step 6: Final answer
    x = 1,901.84

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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.