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Finding the Fourth Proportional to 644,659.60, 966,649.20 and 218,048.80

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Solution

The fourth proportional to 644,659.60, 966,649.20 and 218,048.80 is: 326,958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,659.60 : 966,649.20 = 218,048.80 : x
  2. Step 2: Convert to fraction form
    644,659.60/966,649.20 = 218,048.80/x
  3. Step 3: Cross multiply
    644,659.60x = 966,649.20 × 218,048.80
  4. Step 4: Simplify right side
    644,659.60x = 210,776,698,080.96
  5. Step 5: Solve for x
    x = 210,776,698,080.96/644,659.60
  6. Step 6: Final answer
    x = 326,958.13

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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.