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Finding the Fourth Proportional to 520,074.80, 780,112.20 and 323,466.80

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Solution

The fourth proportional to 520,074.80, 780,112.20 and 323,466.80 is: 485,200.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,074.80 : 780,112.20 = 323,466.80 : x
  2. Step 2: Convert to fraction form
    520,074.80/780,112.20 = 323,466.80/x
  3. Step 3: Cross multiply
    520,074.80x = 780,112.20 × 323,466.80
  4. Step 4: Simplify right side
    520,074.80x = 252,340,396,974.96
  5. Step 5: Solve for x
    x = 252,340,396,974.96/520,074.80
  6. Step 6: Final answer
    x = 485,200.20

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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.