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Finding the Fourth Proportional to 321,555.98, 443,772.34 and 178,344.02

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Solution

The fourth proportional to 321,555.98, 443,772.34 and 178,344.02 is: 246,128.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,555.98 : 443,772.34 = 178,344.02 : x
  2. Step 2: Convert to fraction form
    321,555.98/443,772.34 = 178,344.02/x
  3. Step 3: Cross multiply
    321,555.98x = 443,772.34 × 178,344.02
  4. Step 4: Simplify right side
    321,555.98x = 79,144,143,080.41
  5. Step 5: Solve for x
    x = 79,144,143,080.41/321,555.98
  6. Step 6: Final answer
    x = 246,128.66

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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.