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Finding the Fourth Proportional to 1,253.54, 1,728.23 and 1,028.65

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Solution

The fourth proportional to 1,253.54, 1,728.23 and 1,028.65 is: 1,418.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.54 : 1,728.23 = 1,028.65 : x
  2. Step 2: Convert to fraction form
    1,253.54/1,728.23 = 1,028.65/x
  3. Step 3: Cross multiply
    1,253.54x = 1,728.23 × 1,028.65
  4. Step 4: Simplify right side
    1,253.54x = 1,777,743.79
  5. Step 5: Solve for x
    x = 1,777,743.79/1,253.54
  6. Step 6: Final answer
    x = 1,418.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.