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Finding the Fourth Proportional to 644,095.80, 965,366.10 and 328,390.20

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Solution

The fourth proportional to 644,095.80, 965,366.10 and 328,390.20 is: 492,188.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,095.80 : 965,366.10 = 328,390.20 : x
  2. Step 2: Convert to fraction form
    644,095.80/965,366.10 = 328,390.20/x
  3. Step 3: Cross multiply
    644,095.80x = 965,366.10 × 328,390.20
  4. Step 4: Simplify right side
    644,095.80x = 317,016,766,652.22
  5. Step 5: Solve for x
    x = 317,016,766,652.22/644,095.80
  6. Step 6: Final answer
    x = 492,188.84

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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.