Home / 328,126.21-491,862.28-138,634.30

Finding the Fourth Proportional to 328,126.21, 491,862.28 and 138,634.30

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Solution

The fourth proportional to 328,126.21, 491,862.28 and 138,634.30 is: 207,813.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,126.21 : 491,862.28 = 138,634.30 : x
  2. Step 2: Convert to fraction form
    328,126.21/491,862.28 = 138,634.30/x
  3. Step 3: Cross multiply
    328,126.21x = 491,862.28 × 138,634.30
  4. Step 4: Simplify right side
    328,126.21x = 68,188,982,884.20
  5. Step 5: Solve for x
    x = 68,188,982,884.20/328,126.21
  6. Step 6: Final answer
    x = 207,813.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.