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Finding the Fourth Proportional to 520,474.59, 718,199.63 and 287,864.56

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Solution

The fourth proportional to 520,474.59, 718,199.63 and 287,864.56 is: 397,222.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,474.59 : 718,199.63 = 287,864.56 : x
  2. Step 2: Convert to fraction form
    520,474.59/718,199.63 = 287,864.56/x
  3. Step 3: Cross multiply
    520,474.59x = 718,199.63 × 287,864.56
  4. Step 4: Simplify right side
    520,474.59x = 206,744,222,639.27
  5. Step 5: Solve for x
    x = 206,744,222,639.27/520,474.59
  6. Step 6: Final answer
    x = 397,222.51

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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.