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Finding the Fourth Proportional to 539,883.80, 809,825.70 and 382,290.20

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Solution

The fourth proportional to 539,883.80, 809,825.70 and 382,290.20 is: 573,435.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,883.80 : 809,825.70 = 382,290.20 : x
  2. Step 2: Convert to fraction form
    539,883.80/809,825.70 = 382,290.20/x
  3. Step 3: Cross multiply
    539,883.80x = 809,825.70 × 382,290.20
  4. Step 4: Simplify right side
    539,883.80x = 309,588,428,818.14
  5. Step 5: Solve for x
    x = 309,588,428,818.14/539,883.80
  6. Step 6: Final answer
    x = 573,435.30

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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.