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Finding the Fourth Proportional to 1,356.25, 2,034.38 and 330.25

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Solution

The fourth proportional to 1,356.25, 2,034.38 and 330.25 is: 495.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.25 : 2,034.38 = 330.25 : x
  2. Step 2: Convert to fraction form
    1,356.25/2,034.38 = 330.25/x
  3. Step 3: Cross multiply
    1,356.25x = 2,034.38 × 330.25
  4. Step 4: Simplify right side
    1,356.25x = 671,854.00
  5. Step 5: Solve for x
    x = 671,854.00/1,356.25
  6. Step 6: Final answer
    x = 495.38

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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.