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Finding the Fourth Proportional to 321,721.18, 443,842.18 and 185,658.60

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Solution

The fourth proportional to 321,721.18, 443,842.18 and 185,658.60 is: 256,132.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,721.18 : 443,842.18 = 185,658.60 : x
  2. Step 2: Convert to fraction form
    321,721.18/443,842.18 = 185,658.60/x
  3. Step 3: Cross multiply
    321,721.18x = 443,842.18 × 185,658.60
  4. Step 4: Simplify right side
    321,721.18x = 82,403,117,295.60
  5. Step 5: Solve for x
    x = 82,403,117,295.60/321,721.18
  6. Step 6: Final answer
    x = 256,132.09

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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.