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Finding the Fourth Proportional to 321,850.40, 443,136.96 and 283,468.55

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Solution

The fourth proportional to 321,850.40, 443,136.96 and 283,468.55 is: 390,291.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,850.40 : 443,136.96 = 283,468.55 : x
  2. Step 2: Convert to fraction form
    321,850.40/443,136.96 = 283,468.55/x
  3. Step 3: Cross multiply
    321,850.40x = 443,136.96 × 283,468.55
  4. Step 4: Simplify right side
    321,850.40x = 125,615,389,286.92
  5. Step 5: Solve for x
    x = 125,615,389,286.92/321,850.40
  6. Step 6: Final answer
    x = 390,291.24

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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.