Home / 1,426.28-2,139.53-452.48

Finding the Fourth Proportional to 1,426.28, 2,139.53 and 452.48

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Solution

The fourth proportional to 1,426.28, 2,139.53 and 452.48 is: 678.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.28 : 2,139.53 = 452.48 : x
  2. Step 2: Convert to fraction form
    1,426.28/2,139.53 = 452.48/x
  3. Step 3: Cross multiply
    1,426.28x = 2,139.53 × 452.48
  4. Step 4: Simplify right side
    1,426.28x = 968,081.57
  5. Step 5: Solve for x
    x = 968,081.57/1,426.28
  6. Step 6: Final answer
    x = 678.75

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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.