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Finding the Fourth Proportional to 438,422.80, 657,634.20 and 225,846.40

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Solution

The fourth proportional to 438,422.80, 657,634.20 and 225,846.40 is: 338,769.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,422.80 : 657,634.20 = 225,846.40 : x
  2. Step 2: Convert to fraction form
    438,422.80/657,634.20 = 225,846.40/x
  3. Step 3: Cross multiply
    438,422.80x = 657,634.20 × 225,846.40
  4. Step 4: Simplify right side
    438,422.80x = 148,524,316,586.88
  5. Step 5: Solve for x
    x = 148,524,316,586.88/438,422.80
  6. Step 6: Final answer
    x = 338,769.60

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Similar ratio
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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.