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Finding the Fourth Proportional to 2,523.80, 3,785.70 and 879.80

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Solution

The fourth proportional to 2,523.80, 3,785.70 and 879.80 is: 1,319.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,523.80 : 3,785.70 = 879.80 : x
  2. Step 2: Convert to fraction form
    2,523.80/3,785.70 = 879.80/x
  3. Step 3: Cross multiply
    2,523.80x = 3,785.70 × 879.80
  4. Step 4: Simplify right side
    2,523.80x = 3,330,658.86
  5. Step 5: Solve for x
    x = 3,330,658.86/2,523.80
  6. Step 6: Final answer
    x = 1,319.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.