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Finding the Fourth Proportional to 341,998.80, 512,998.20 and 128,766.30

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Solution

The fourth proportional to 341,998.80, 512,998.20 and 128,766.30 is: 193,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,998.80 : 512,998.20 = 128,766.30 : x
  2. Step 2: Convert to fraction form
    341,998.80/512,998.20 = 128,766.30/x
  3. Step 3: Cross multiply
    341,998.80x = 512,998.20 × 128,766.30
  4. Step 4: Simplify right side
    341,998.80x = 66,056,880,120.66
  5. Step 5: Solve for x
    x = 66,056,880,120.66/341,998.80
  6. Step 6: Final answer
    x = 193,149.45

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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.