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Finding the Fourth Proportional to 321,511.79, 443,645.49 and 176,279.35

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Solution

The fourth proportional to 321,511.79, 443,645.49 and 176,279.35 is: 243,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,511.79 : 443,645.49 = 176,279.35 : x
  2. Step 2: Convert to fraction form
    321,511.79/443,645.49 = 176,279.35/x
  3. Step 3: Cross multiply
    321,511.79x = 443,645.49 × 176,279.35
  4. Step 4: Simplify right side
    321,511.79x = 78,205,538,280.79
  5. Step 5: Solve for x
    x = 78,205,538,280.79/321,511.79
  6. Step 6: Final answer
    x = 243,243.15

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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.