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Finding the Fourth Proportional to 643,069.56, 963,763.42 and 263,545.93

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Solution

The fourth proportional to 643,069.56, 963,763.42 and 263,545.93 is: 394,974.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,069.56 : 963,763.42 = 263,545.93 : x
  2. Step 2: Convert to fraction form
    643,069.56/963,763.42 = 263,545.93/x
  3. Step 3: Cross multiply
    643,069.56x = 963,763.42 × 263,545.93
  4. Step 4: Simplify right side
    643,069.56x = 253,995,926,823.88
  5. Step 5: Solve for x
    x = 253,995,926,823.88/643,069.56
  6. Step 6: Final answer
    x = 394,974.27

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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.