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Finding the Fourth Proportional to 539,371.80, 809,057.70 and 371,410.20

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Solution

The fourth proportional to 539,371.80, 809,057.70 and 371,410.20 is: 557,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,371.80 : 809,057.70 = 371,410.20 : x
  2. Step 2: Convert to fraction form
    539,371.80/809,057.70 = 371,410.20/x
  3. Step 3: Cross multiply
    539,371.80x = 809,057.70 × 371,410.20
  4. Step 4: Simplify right side
    539,371.80x = 300,492,282,168.54
  5. Step 5: Solve for x
    x = 300,492,282,168.54/539,371.80
  6. Step 6: Final answer
    x = 557,115.30

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Double scale
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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.