Home / 1,299.85-1,939.61-1,161.74

Finding the Fourth Proportional to 1,299.85, 1,939.61 and 1,161.74

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Solution

The fourth proportional to 1,299.85, 1,939.61 and 1,161.74 is: 1,733.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.85 : 1,939.61 = 1,161.74 : x
  2. Step 2: Convert to fraction form
    1,299.85/1,939.61 = 1,161.74/x
  3. Step 3: Cross multiply
    1,299.85x = 1,939.61 × 1,161.74
  4. Step 4: Simplify right side
    1,299.85x = 2,253,330.27
  5. Step 5: Solve for x
    x = 2,253,330.27/1,299.85
  6. Step 6: Final answer
    x = 1,733.53

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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.