Home / 1,511.28-2,085.36-881.76

Finding the Fourth Proportional to 1,511.28, 2,085.36 and 881.76

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Solution

The fourth proportional to 1,511.28, 2,085.36 and 881.76 is: 1,216.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.28 : 2,085.36 = 881.76 : x
  2. Step 2: Convert to fraction form
    1,511.28/2,085.36 = 881.76/x
  3. Step 3: Cross multiply
    1,511.28x = 2,085.36 × 881.76
  4. Step 4: Simplify right side
    1,511.28x = 1,838,787.03
  5. Step 5: Solve for x
    x = 1,838,787.03/1,511.28
  6. Step 6: Final answer
    x = 1,216.71

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1.5x scale

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.