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Finding the Fourth Proportional to 228,388.55, 315,168.12 and 126,414.20

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Solution

The fourth proportional to 228,388.55, 315,168.12 and 126,414.20 is: 174,447.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,388.55 : 315,168.12 = 126,414.20 : x
  2. Step 2: Convert to fraction form
    228,388.55/315,168.12 = 126,414.20/x
  3. Step 3: Cross multiply
    228,388.55x = 315,168.12 × 126,414.20
  4. Step 4: Simplify right side
    228,388.55x = 39,841,726,543.22
  5. Step 5: Solve for x
    x = 39,841,726,543.22/228,388.55
  6. Step 6: Final answer
    x = 174,447.13

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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.