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Finding the Fourth Proportional to 321,554.40, 443,233.56 and 253,460.88

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Solution

The fourth proportional to 321,554.40, 443,233.56 and 253,460.88 is: 349,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,554.40 : 443,233.56 = 253,460.88 : x
  2. Step 2: Convert to fraction form
    321,554.40/443,233.56 = 253,460.88/x
  3. Step 3: Cross multiply
    321,554.40x = 443,233.56 × 253,460.88
  4. Step 4: Simplify right side
    321,554.40x = 112,342,368,163.13
  5. Step 5: Solve for x
    x = 112,342,368,163.13/321,554.40
  6. Step 6: Final answer
    x = 349,372.82

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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.