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Finding the Fourth Proportional to 321,119.21, 443,144.49 and 177,888.53

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Solution

The fourth proportional to 321,119.21, 443,144.49 and 177,888.53 is: 245,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,119.21 : 443,144.49 = 177,888.53 : x
  2. Step 2: Convert to fraction form
    321,119.21/443,144.49 = 177,888.53/x
  3. Step 3: Cross multiply
    321,119.21x = 443,144.49 × 177,888.53
  4. Step 4: Simplify right side
    321,119.21x = 78,830,321,903.70
  5. Step 5: Solve for x
    x = 78,830,321,903.70/321,119.21
  6. Step 6: Final answer
    x = 245,486.16

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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.