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Finding the Fourth Proportional to 321,415.39, 443,557.25 and 185,477.55

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Solution

The fourth proportional to 321,415.39, 443,557.25 and 185,477.55 is: 255,961.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,415.39 : 443,557.25 = 185,477.55 : x
  2. Step 2: Convert to fraction form
    321,415.39/443,557.25 = 185,477.55/x
  3. Step 3: Cross multiply
    321,415.39x = 443,557.25 × 185,477.55
  4. Step 4: Simplify right side
    321,415.39x = 82,269,912,014.74
  5. Step 5: Solve for x
    x = 82,269,912,014.74/321,415.39
  6. Step 6: Final answer
    x = 255,961.33

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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.