Home / 1,511.15-2,085.33-881.71

Finding the Fourth Proportional to 1,511.15, 2,085.33 and 881.71

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Solution

The fourth proportional to 1,511.15, 2,085.33 and 881.71 is: 1,216.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.15 : 2,085.33 = 881.71 : x
  2. Step 2: Convert to fraction form
    1,511.15/2,085.33 = 881.71/x
  3. Step 3: Cross multiply
    1,511.15x = 2,085.33 × 881.71
  4. Step 4: Simplify right side
    1,511.15x = 1,838,657.12
  5. Step 5: Solve for x
    x = 1,838,657.12/1,511.15
  6. Step 6: Final answer
    x = 1,216.73

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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.