Home / 1,356.28-2,034.64-490.80

Finding the Fourth Proportional to 1,356.28, 2,034.64 and 490.80

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Solution

The fourth proportional to 1,356.28, 2,034.64 and 490.80 is: 736.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.28 : 2,034.64 = 490.80 : x
  2. Step 2: Convert to fraction form
    1,356.28/2,034.64 = 490.80/x
  3. Step 3: Cross multiply
    1,356.28x = 2,034.64 × 490.80
  4. Step 4: Simplify right side
    1,356.28x = 998,601.31
  5. Step 5: Solve for x
    x = 998,601.31/1,356.28
  6. Step 6: Final answer
    x = 736.28

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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.