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Finding the Fourth Proportional to 2,191.88, 3,287.82 and 652.88

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Solution

The fourth proportional to 2,191.88, 3,287.82 and 652.88 is: 979.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.88 : 3,287.82 = 652.88 : x
  2. Step 2: Convert to fraction form
    2,191.88/3,287.82 = 652.88/x
  3. Step 3: Cross multiply
    2,191.88x = 3,287.82 × 652.88
  4. Step 4: Simplify right side
    2,191.88x = 2,146,535.48
  5. Step 5: Solve for x
    x = 2,146,535.48/2,191.88
  6. Step 6: Final answer
    x = 979.31

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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.