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Finding the Fourth Proportional to 543,128.20, 814,692.30 and 342,361.60

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Solution

The fourth proportional to 543,128.20, 814,692.30 and 342,361.60 is: 513,542.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,128.20 : 814,692.30 = 342,361.60 : x
  2. Step 2: Convert to fraction form
    543,128.20/814,692.30 = 342,361.60/x
  3. Step 3: Cross multiply
    543,128.20x = 814,692.30 × 342,361.60
  4. Step 4: Simplify right side
    543,128.20x = 278,919,359,335.68
  5. Step 5: Solve for x
    x = 278,919,359,335.68/543,128.20
  6. Step 6: Final answer
    x = 513,542.40

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Double scale
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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.