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Finding the Fourth Proportional to 644,657.60, 966,989.10 and 218,196.80

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Solution

The fourth proportional to 644,657.60, 966,989.10 and 218,196.80 is: 327,296.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,657.60 : 966,989.10 = 218,196.80 : x
  2. Step 2: Convert to fraction form
    644,657.60/966,989.10 = 218,196.80/x
  3. Step 3: Cross multiply
    644,657.60x = 966,989.10 × 218,196.80
  4. Step 4: Simplify right side
    644,657.60x = 210,993,927,254.88
  5. Step 5: Solve for x
    x = 210,993,927,254.88/644,657.60
  6. Step 6: Final answer
    x = 327,296.11

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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.