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Finding the Fourth Proportional to 225,643.20, 338,464.80 and 215,275.20

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Solution

The fourth proportional to 225,643.20, 338,464.80 and 215,275.20 is: 322,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,643.20 : 338,464.80 = 215,275.20 : x
  2. Step 2: Convert to fraction form
    225,643.20/338,464.80 = 215,275.20/x
  3. Step 3: Cross multiply
    225,643.20x = 338,464.80 × 215,275.20
  4. Step 4: Simplify right side
    225,643.20x = 72,863,077,512.96
  5. Step 5: Solve for x
    x = 72,863,077,512.96/225,643.20
  6. Step 6: Final answer
    x = 322,912.80

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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.