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Finding the Fourth Proportional to 1,426.68, 2,140.83 and 880.20

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Solution

The fourth proportional to 1,426.68, 2,140.83 and 880.20 is: 1,320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.68 : 2,140.83 = 880.20 : x
  2. Step 2: Convert to fraction form
    1,426.68/2,140.83 = 880.20/x
  3. Step 3: Cross multiply
    1,426.68x = 2,140.83 × 880.20
  4. Step 4: Simplify right side
    1,426.68x = 1,884,358.57
  5. Step 5: Solve for x
    x = 1,884,358.57/1,426.68
  6. Step 6: Final answer
    x = 1,320.80

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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.