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Finding the Fourth Proportional to 348,512.80, 522,769.20 and 138,042.40

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Solution

The fourth proportional to 348,512.80, 522,769.20 and 138,042.40 is: 207,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,512.80 : 522,769.20 = 138,042.40 : x
  2. Step 2: Convert to fraction form
    348,512.80/522,769.20 = 138,042.40/x
  3. Step 3: Cross multiply
    348,512.80x = 522,769.20 × 138,042.40
  4. Step 4: Simplify right side
    348,512.80x = 72,164,315,014.08
  5. Step 5: Solve for x
    x = 72,164,315,014.08/348,512.80
  6. Step 6: Final answer
    x = 207,063.60

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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.