Home / 1,356.33-2,034.40-431.85

Finding the Fourth Proportional to 1,356.33, 2,034.40 and 431.85

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Solution

The fourth proportional to 1,356.33, 2,034.40 and 431.85 is: 647.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.33 : 2,034.40 = 431.85 : x
  2. Step 2: Convert to fraction form
    1,356.33/2,034.40 = 431.85/x
  3. Step 3: Cross multiply
    1,356.33x = 2,034.40 × 431.85
  4. Step 4: Simplify right side
    1,356.33x = 878,555.64
  5. Step 5: Solve for x
    x = 878,555.64/1,356.33
  6. Step 6: Final answer
    x = 647.74

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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.