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Finding the Fourth Proportional to 520,028.70, 780,043.05 and 204,495.90

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Solution

The fourth proportional to 520,028.70, 780,043.05 and 204,495.90 is: 306,743.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,028.70 : 780,043.05 = 204,495.90 : x
  2. Step 2: Convert to fraction form
    520,028.70/780,043.05 = 204,495.90/x
  3. Step 3: Cross multiply
    520,028.70x = 780,043.05 × 204,495.90
  4. Step 4: Simplify right side
    520,028.70x = 159,515,605,548.50
  5. Step 5: Solve for x
    x = 159,515,605,548.50/520,028.70
  6. Step 6: Final answer
    x = 306,743.85

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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.