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Finding the Fourth Proportional to 1,356.68, 2,033.78 and 490.78

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Solution

The fourth proportional to 1,356.68, 2,033.78 and 490.78 is: 735.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.68 : 2,033.78 = 490.78 : x
  2. Step 2: Convert to fraction form
    1,356.68/2,033.78 = 490.78/x
  3. Step 3: Cross multiply
    1,356.68x = 2,033.78 × 490.78
  4. Step 4: Simplify right side
    1,356.68x = 998,138.55
  5. Step 5: Solve for x
    x = 998,138.55/1,356.68
  6. Step 6: Final answer
    x = 735.72

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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.