Home / 1,511.16-2,085.35-881.70

Finding the Fourth Proportional to 1,511.16, 2,085.35 and 881.70

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Solution

The fourth proportional to 1,511.16, 2,085.35 and 881.70 is: 1,216.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.16 : 2,085.35 = 881.70 : x
  2. Step 2: Convert to fraction form
    1,511.16/2,085.35 = 881.70/x
  3. Step 3: Cross multiply
    1,511.16x = 2,085.35 × 881.70
  4. Step 4: Simplify right side
    1,511.16x = 1,838,648.69
  5. Step 5: Solve for x
    x = 1,838,648.69/1,511.16
  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.