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Finding the Fourth Proportional to 2,166.80, 3,248.56 and 760.84

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Solution

The fourth proportional to 2,166.80, 3,248.56 and 760.84 is: 1,140.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.80 : 3,248.56 = 760.84 : x
  2. Step 2: Convert to fraction form
    2,166.80/3,248.56 = 760.84/x
  3. Step 3: Cross multiply
    2,166.80x = 3,248.56 × 760.84
  4. Step 4: Simplify right side
    2,166.80x = 2,471,641.21
  5. Step 5: Solve for x
    x = 2,471,641.21/2,166.80
  6. Step 6: Final answer
    x = 1,140.69

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1.5x scale

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.