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Finding the Fourth Proportional to 520,068.70, 780,103.05 and 204,535.90

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Solution

The fourth proportional to 520,068.70, 780,103.05 and 204,535.90 is: 306,803.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,068.70 : 780,103.05 = 204,535.90 : x
  2. Step 2: Convert to fraction form
    520,068.70/780,103.05 = 204,535.90/x
  3. Step 3: Cross multiply
    520,068.70x = 780,103.05 × 204,535.90
  4. Step 4: Simplify right side
    520,068.70x = 159,559,079,424.50
  5. Step 5: Solve for x
    x = 159,559,079,424.50/520,068.70
  6. Step 6: Final answer
    x = 306,803.85

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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.