Home / 1,426.32-2,139.55-452.49

Finding the Fourth Proportional to 1,426.32, 2,139.55 and 452.49

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Solution

The fourth proportional to 1,426.32, 2,139.55 and 452.49 is: 678.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.32 : 2,139.55 = 452.49 : x
  2. Step 2: Convert to fraction form
    1,426.32/2,139.55 = 452.49/x
  3. Step 3: Cross multiply
    1,426.32x = 2,139.55 × 452.49
  4. Step 4: Simplify right side
    1,426.32x = 968,129.20
  5. Step 5: Solve for x
    x = 968,129.20/1,426.32
  6. Step 6: Final answer
    x = 678.76

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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.