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Finding the Fourth Proportional to 342,814.70, 472,863.78 and 215,268.86

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Solution

The fourth proportional to 342,814.70, 472,863.78 and 215,268.86 is: 296,932.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,814.70 : 472,863.78 = 215,268.86 : x
  2. Step 2: Convert to fraction form
    342,814.70/472,863.78 = 215,268.86/x
  3. Step 3: Cross multiply
    342,814.70x = 472,863.78 × 215,268.86
  4. Step 4: Simplify right side
    342,814.70x = 101,792,846,855.89
  5. Step 5: Solve for x
    x = 101,792,846,855.89/342,814.70
  6. Step 6: Final answer
    x = 296,932.56

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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.