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Finding the Fourth Proportional to 321,609.98, 443,854.20 and 178,397.96

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Solution

The fourth proportional to 321,609.98, 443,854.20 and 178,397.96 is: 246,207.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,609.98 : 443,854.20 = 178,397.96 : x
  2. Step 2: Convert to fraction form
    321,609.98/443,854.20 = 178,397.96/x
  3. Step 3: Cross multiply
    321,609.98x = 443,854.20 × 178,397.96
  4. Step 4: Simplify right side
    321,609.98x = 79,182,683,817.43
  5. Step 5: Solve for x
    x = 79,182,683,817.43/321,609.98
  6. Step 6: Final answer
    x = 246,207.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.