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Finding the Fourth Proportional to 321,453.55, 443,605.17 and 178,209.91

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Solution

The fourth proportional to 321,453.55, 443,605.17 and 178,209.91 is: 245,929.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,453.55 : 443,605.17 = 178,209.91 : x
  2. Step 2: Convert to fraction form
    321,453.55/443,605.17 = 178,209.91/x
  3. Step 3: Cross multiply
    321,453.55x = 443,605.17 × 178,209.91
  4. Step 4: Simplify right side
    321,453.55x = 79,054,837,421.23
  5. Step 5: Solve for x
    x = 79,054,837,421.23/321,453.55
  6. Step 6: Final answer
    x = 245,929.27

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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.