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Finding the Fourth Proportional to 2,191.62, 3,287.91 and 652.74

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Solution

The fourth proportional to 2,191.62, 3,287.91 and 652.74 is: 979.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.62 : 3,287.91 = 652.74 : x
  2. Step 2: Convert to fraction form
    2,191.62/3,287.91 = 652.74/x
  3. Step 3: Cross multiply
    2,191.62x = 3,287.91 × 652.74
  4. Step 4: Simplify right side
    2,191.62x = 2,146,150.37
  5. Step 5: Solve for x
    x = 2,146,150.37/2,191.62
  6. Step 6: Final answer
    x = 979.25

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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.