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Finding the Fourth Proportional to 539,543.20, 809,314.80 and 258,992.80

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Solution

The fourth proportional to 539,543.20, 809,314.80 and 258,992.80 is: 388,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,543.20 : 809,314.80 = 258,992.80 : x
  2. Step 2: Convert to fraction form
    539,543.20/809,314.80 = 258,992.80/x
  3. Step 3: Cross multiply
    539,543.20x = 809,314.80 × 258,992.80
  4. Step 4: Simplify right side
    539,543.20x = 209,606,706,133.44
  5. Step 5: Solve for x
    x = 209,606,706,133.44/539,543.20
  6. Step 6: Final answer
    x = 388,489.20

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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.