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Finding the Fourth Proportional to 539,791.50, 809,688.28 and 140,431.62

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Solution

The fourth proportional to 539,791.50, 809,688.28 and 140,431.62 is: 210,647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,791.50 : 809,688.28 = 140,431.62 : x
  2. Step 2: Convert to fraction form
    539,791.50/809,688.28 = 140,431.62/x
  3. Step 3: Cross multiply
    539,791.50x = 809,688.28 × 140,431.62
  4. Step 4: Simplify right side
    539,791.50x = 113,705,836,855.41
  5. Step 5: Solve for x
    x = 113,705,836,855.41/539,791.50
  6. Step 6: Final answer
    x = 210,647.70

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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.