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Finding the Fourth Proportional to 381,699.80, 572,549.70 and 378,200.60

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Solution

The fourth proportional to 381,699.80, 572,549.70 and 378,200.60 is: 567,300.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,699.80 : 572,549.70 = 378,200.60 : x
  2. Step 2: Convert to fraction form
    381,699.80/572,549.70 = 378,200.60/x
  3. Step 3: Cross multiply
    381,699.80x = 572,549.70 × 378,200.60
  4. Step 4: Simplify right side
    381,699.80x = 216,538,640,069.82
  5. Step 5: Solve for x
    x = 216,538,640,069.82/381,699.80
  6. Step 6: Final answer
    x = 567,300.90

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Similar ratio
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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.