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Finding the Fourth Proportional to 321,416.39, 443,558.63 and 185,478.55

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Solution

The fourth proportional to 321,416.39, 443,558.63 and 185,478.55 is: 255,962.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,416.39 : 443,558.63 = 185,478.55 : x
  2. Step 2: Convert to fraction form
    321,416.39/443,558.63 = 185,478.55/x
  3. Step 3: Cross multiply
    321,416.39x = 443,558.63 × 185,478.55
  4. Step 4: Simplify right side
    321,416.39x = 82,270,611,532.39
  5. Step 5: Solve for x
    x = 82,270,611,532.39/321,416.39
  6. Step 6: Final answer
    x = 255,962.71

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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.