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Finding the Fourth Proportional to 520,082.20, 779,604.90 and 239,109.40

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Solution

The fourth proportional to 520,082.20, 779,604.90 and 239,109.40 is: 358,425.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,082.20 : 779,604.90 = 239,109.40 : x
  2. Step 2: Convert to fraction form
    520,082.20/779,604.90 = 239,109.40/x
  3. Step 3: Cross multiply
    520,082.20x = 779,604.90 × 239,109.40
  4. Step 4: Simplify right side
    520,082.20x = 186,410,859,876.06
  5. Step 5: Solve for x
    x = 186,410,859,876.06/520,082.20
  6. Step 6: Final answer
    x = 358,425.76

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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.