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Finding the Fourth Proportional to 643,578.62, 965,373.72 and 163,806.93

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Solution

The fourth proportional to 643,578.62, 965,373.72 and 163,806.93 is: 245,711.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,578.62 : 965,373.72 = 163,806.93 : x
  2. Step 2: Convert to fraction form
    643,578.62/965,373.72 = 163,806.93/x
  3. Step 3: Cross multiply
    643,578.62x = 965,373.72 × 163,806.93
  4. Step 4: Simplify right side
    643,578.62x = 158,134,907,937.42
  5. Step 5: Solve for x
    x = 158,134,907,937.42/643,578.62
  6. Step 6: Final answer
    x = 245,711.87

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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.