Home / 1,426.60-2,139.68-452.57

Finding the Fourth Proportional to 1,426.60, 2,139.68 and 452.57

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Solution

The fourth proportional to 1,426.60, 2,139.68 and 452.57 is: 678.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.60 : 2,139.68 = 452.57 : x
  2. Step 2: Convert to fraction form
    1,426.60/2,139.68 = 452.57/x
  3. Step 3: Cross multiply
    1,426.60x = 2,139.68 × 452.57
  4. Step 4: Simplify right side
    1,426.60x = 968,352.71
  5. Step 5: Solve for x
    x = 968,352.71/1,426.60
  6. Step 6: Final answer
    x = 678.79

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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.