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Finding the Fourth Proportional to 2,387.99, 3,581.49 and 656.21

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Solution

The fourth proportional to 2,387.99, 3,581.49 and 656.21 is: 984.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.99 : 3,581.49 = 656.21 : x
  2. Step 2: Convert to fraction form
    2,387.99/3,581.49 = 656.21/x
  3. Step 3: Cross multiply
    2,387.99x = 3,581.49 × 656.21
  4. Step 4: Simplify right side
    2,387.99x = 2,350,209.55
  5. Step 5: Solve for x
    x = 2,350,209.55/2,387.99
  6. Step 6: Final answer
    x = 984.18

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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.