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Finding the Fourth Proportional to 321,621.88, 443,325.54 and 253,527.88

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Solution

The fourth proportional to 321,621.88, 443,325.54 and 253,527.88 is: 349,464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,621.88 : 443,325.54 = 253,527.88 : x
  2. Step 2: Convert to fraction form
    321,621.88/443,325.54 = 253,527.88/x
  3. Step 3: Cross multiply
    321,621.88x = 443,325.54 × 253,527.88
  4. Step 4: Simplify right side
    321,621.88x = 112,395,384,306.06
  5. Step 5: Solve for x
    x = 112,395,384,306.06/321,621.88
  6. Step 6: Final answer
    x = 349,464.36

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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.