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Finding the Fourth Proportional to 643,768.88, 965,690.20 and 170,441.92

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Solution

The fourth proportional to 643,768.88, 965,690.20 and 170,441.92 is: 255,672.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,768.88 : 965,690.20 = 170,441.92 : x
  2. Step 2: Convert to fraction form
    643,768.88/965,690.20 = 170,441.92/x
  3. Step 3: Cross multiply
    643,768.88x = 965,690.20 × 170,441.92
  4. Step 4: Simplify right side
    643,768.88x = 164,594,091,813.18
  5. Step 5: Solve for x
    x = 164,594,091,813.18/643,768.88
  6. Step 6: Final answer
    x = 255,672.64

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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.