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Finding the Fourth Proportional to 265,813.68, 398,727.72 and 85,906.80

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Solution

The fourth proportional to 265,813.68, 398,727.72 and 85,906.80 is: 128,862.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,813.68 : 398,727.72 = 85,906.80 : x
  2. Step 2: Convert to fraction form
    265,813.68/398,727.72 = 85,906.80/x
  3. Step 3: Cross multiply
    265,813.68x = 398,727.72 × 85,906.80
  4. Step 4: Simplify right side
    265,813.68x = 34,253,422,496.50
  5. Step 5: Solve for x
    x = 34,253,422,496.50/265,813.68
  6. Step 6: Final answer
    x = 128,862.53

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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.