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Finding the Fourth Proportional to 321,261.86, 443,340.17 and 178,021.79

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Solution

The fourth proportional to 321,261.86, 443,340.17 and 178,021.79 is: 245,669.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,261.86 : 443,340.17 = 178,021.79 : x
  2. Step 2: Convert to fraction form
    321,261.86/443,340.17 = 178,021.79/x
  3. Step 3: Cross multiply
    321,261.86x = 443,340.17 × 178,021.79
  4. Step 4: Simplify right side
    321,261.86x = 78,924,210,642.30
  5. Step 5: Solve for x
    x = 78,924,210,642.30/321,261.86
  6. Step 6: Final answer
    x = 245,669.41

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1.5x scale

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.