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Finding the Fourth Proportional to 520,082.20, 717,711.33 and 290,639.42

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Solution

The fourth proportional to 520,082.20, 717,711.33 and 290,639.42 is: 401,081.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,082.20 : 717,711.33 = 290,639.42 : x
  2. Step 2: Convert to fraction form
    520,082.20/717,711.33 = 290,639.42/x
  3. Step 3: Cross multiply
    520,082.20x = 717,711.33 × 290,639.42
  4. Step 4: Simplify right side
    520,082.20x = 208,595,206,472.91
  5. Step 5: Solve for x
    x = 208,595,206,472.91/520,082.20
  6. Step 6: Final answer
    x = 401,081.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.