Home / 1,909.15-2,862.82-739.70

Finding the Fourth Proportional to 1,909.15, 2,862.82 and 739.70

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Solution

The fourth proportional to 1,909.15, 2,862.82 and 739.70 is: 1,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.15 : 2,862.82 = 739.70 : x
  2. Step 2: Convert to fraction form
    1,909.15/2,862.82 = 739.70/x
  3. Step 3: Cross multiply
    1,909.15x = 2,862.82 × 739.70
  4. Step 4: Simplify right side
    1,909.15x = 2,117,627.95
  5. Step 5: Solve for x
    x = 2,117,627.95/1,909.15
  6. Step 6: Final answer
    x = 1,109.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.