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Finding the Fourth Proportional to 225,638.40, 338,587.20 and 85,497.60

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Solution

The fourth proportional to 225,638.40, 338,587.20 and 85,497.60 is: 128,295.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,638.40 : 338,587.20 = 85,497.60 : x
  2. Step 2: Convert to fraction form
    225,638.40/338,587.20 = 85,497.60/x
  3. Step 3: Cross multiply
    225,638.40x = 338,587.20 × 85,497.60
  4. Step 4: Simplify right side
    225,638.40x = 28,948,392,990.72
  5. Step 5: Solve for x
    x = 28,948,392,990.72/225,638.40
  6. Step 6: Final answer
    x = 128,295.51

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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.