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Finding the Fourth Proportional to 644,712.60, 966,728.70 and 218,101.80

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Solution

The fourth proportional to 644,712.60, 966,728.70 and 218,101.80 is: 327,037.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,712.60 : 966,728.70 = 218,101.80 : x
  2. Step 2: Convert to fraction form
    644,712.60/966,728.70 = 218,101.80/x
  3. Step 3: Cross multiply
    644,712.60x = 966,728.70 × 218,101.80
  4. Step 4: Simplify right side
    644,712.60x = 210,845,269,581.66
  5. Step 5: Solve for x
    x = 210,845,269,581.66/644,712.60
  6. Step 6: Final answer
    x = 327,037.61

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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.