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Finding the Fourth Proportional to 539,427.20, 809,140.80 and 140,064.80

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Solution

The fourth proportional to 539,427.20, 809,140.80 and 140,064.80 is: 210,097.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,427.20 : 809,140.80 = 140,064.80 : x
  2. Step 2: Convert to fraction form
    539,427.20/809,140.80 = 140,064.80/x
  3. Step 3: Cross multiply
    539,427.20x = 809,140.80 × 140,064.80
  4. Step 4: Simplify right side
    539,427.20x = 113,332,144,323.84
  5. Step 5: Solve for x
    x = 113,332,144,323.84/539,427.20
  6. Step 6: Final answer
    x = 210,097.20

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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.