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Finding the Fourth Proportional to 643,694.16, 888,207.27 and 385,510.61

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Solution

The fourth proportional to 643,694.16, 888,207.27 and 385,510.61 is: 531,950.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,694.16 : 888,207.27 = 385,510.61 : x
  2. Step 2: Convert to fraction form
    643,694.16/888,207.27 = 385,510.61/x
  3. Step 3: Cross multiply
    643,694.16x = 888,207.27 × 385,510.61
  4. Step 4: Simplify right side
    643,694.16x = 342,413,322,023.10
  5. Step 5: Solve for x
    x = 342,413,322,023.10/643,694.16
  6. Step 6: Final answer
    x = 531,950.33

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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.