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Finding the Fourth Proportional to 520,028.60, 780,129.30 and 204,495.80

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Solution

The fourth proportional to 520,028.60, 780,129.30 and 204,495.80 is: 306,777.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,028.60 : 780,129.30 = 204,495.80 : x
  2. Step 2: Convert to fraction form
    520,028.60/780,129.30 = 204,495.80/x
  3. Step 3: Cross multiply
    520,028.60x = 780,129.30 × 204,495.80
  4. Step 4: Simplify right side
    520,028.60x = 159,533,165,306.94
  5. Step 5: Solve for x
    x = 159,533,165,306.94/520,028.60
  6. Step 6: Final answer
    x = 306,777.68

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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.