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Finding the Fourth Proportional to 1,661.48, 2,481.88 and 1,229.48

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Solution

The fourth proportional to 1,661.48, 2,481.88 and 1,229.48 is: 1,836.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.48 : 2,481.88 = 1,229.48 : x
  2. Step 2: Convert to fraction form
    1,661.48/2,481.88 = 1,229.48/x
  3. Step 3: Cross multiply
    1,661.48x = 2,481.88 × 1,229.48
  4. Step 4: Simplify right side
    1,661.48x = 3,051,421.82
  5. Step 5: Solve for x
    x = 3,051,421.82/1,661.48
  6. Step 6: Final answer
    x = 1,836.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.