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Finding the Fourth Proportional to 539,520.76, 809,281.68 and 140,128.12

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Solution

The fourth proportional to 539,520.76, 809,281.68 and 140,128.12 is: 210,192.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,520.76 : 809,281.68 = 140,128.12 : x
  2. Step 2: Convert to fraction form
    539,520.76/809,281.68 = 140,128.12/x
  3. Step 3: Cross multiply
    539,520.76x = 809,281.68 × 140,128.12
  4. Step 4: Simplify right side
    539,520.76x = 113,403,120,368.84
  5. Step 5: Solve for x
    x = 113,403,120,368.84/539,520.76
  6. Step 6: Final answer
    x = 210,192.32

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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.