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Finding the Fourth Proportional to 520,229.40, 780,489.90 and 253,998.60

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Solution

The fourth proportional to 520,229.40, 780,489.90 and 253,998.60 is: 381,069.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,229.40 : 780,489.90 = 253,998.60 : x
  2. Step 2: Convert to fraction form
    520,229.40/780,489.90 = 253,998.60/x
  3. Step 3: Cross multiply
    520,229.40x = 780,489.90 × 253,998.60
  4. Step 4: Simplify right side
    520,229.40x = 198,243,341,914.14
  5. Step 5: Solve for x
    x = 198,243,341,914.14/520,229.40
  6. Step 6: Final answer
    x = 381,069.09

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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.