Home / 1,297.20-1,789.76-737.66

Finding the Fourth Proportional to 1,297.20, 1,789.76 and 737.66

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Solution

The fourth proportional to 1,297.20, 1,789.76 and 737.66 is: 1,017.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.20 : 1,789.76 = 737.66 : x
  2. Step 2: Convert to fraction form
    1,297.20/1,789.76 = 737.66/x
  3. Step 3: Cross multiply
    1,297.20x = 1,789.76 × 737.66
  4. Step 4: Simplify right side
    1,297.20x = 1,320,221.72
  5. Step 5: Solve for x
    x = 1,320,221.72/1,297.20
  6. Step 6: Final answer
    x = 1,017.75

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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.