Home / 1,356.27-2,034.87-431.92

Finding the Fourth Proportional to 1,356.27, 2,034.87 and 431.92

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Solution

The fourth proportional to 1,356.27, 2,034.87 and 431.92 is: 648.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.27 : 2,034.87 = 431.92 : x
  2. Step 2: Convert to fraction form
    1,356.27/2,034.87 = 431.92/x
  3. Step 3: Cross multiply
    1,356.27x = 2,034.87 × 431.92
  4. Step 4: Simplify right side
    1,356.27x = 878,901.05
  5. Step 5: Solve for x
    x = 878,901.05/1,356.27
  6. Step 6: Final answer
    x = 648.03

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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.