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Finding the Fourth Proportional to 539,403.20, 809,104.80 and 140,040.80

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Solution

The fourth proportional to 539,403.20, 809,104.80 and 140,040.80 is: 210,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,403.20 : 809,104.80 = 140,040.80 : x
  2. Step 2: Convert to fraction form
    539,403.20/809,104.80 = 140,040.80/x
  3. Step 3: Cross multiply
    539,403.20x = 809,104.80 × 140,040.80
  4. Step 4: Simplify right side
    539,403.20x = 113,307,683,475.84
  5. Step 5: Solve for x
    x = 113,307,683,475.84/539,403.20
  6. Step 6: Final answer
    x = 210,061.20

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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.