Home / 1,314.18-1,811.80-1,126.86

Finding the Fourth Proportional to 1,314.18, 1,811.80 and 1,126.86

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Solution

The fourth proportional to 1,314.18, 1,811.80 and 1,126.86 is: 1,553.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.18 : 1,811.80 = 1,126.86 : x
  2. Step 2: Convert to fraction form
    1,314.18/1,811.80 = 1,126.86/x
  3. Step 3: Cross multiply
    1,314.18x = 1,811.80 × 1,126.86
  4. Step 4: Simplify right side
    1,314.18x = 2,041,644.95
  5. Step 5: Solve for x
    x = 2,041,644.95/1,314.18
  6. Step 6: Final answer
    x = 1,553.55

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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.