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Finding the Fourth Proportional to 1,789.80, 2,469.88 and 993.12

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Solution

The fourth proportional to 1,789.80, 2,469.88 and 993.12 is: 1,370.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.80 : 2,469.88 = 993.12 : x
  2. Step 2: Convert to fraction form
    1,789.80/2,469.88 = 993.12/x
  3. Step 3: Cross multiply
    1,789.80x = 2,469.88 × 993.12
  4. Step 4: Simplify right side
    1,789.80x = 2,452,887.23
  5. Step 5: Solve for x
    x = 2,452,887.23/1,789.80
  6. Step 6: Final answer
    x = 1,370.48

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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.