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Finding the Fourth Proportional to 2,610.61, 3,915.90 and 636.21

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Solution

The fourth proportional to 2,610.61, 3,915.90 and 636.21 is: 954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,610.61 : 3,915.90 = 636.21 : x
  2. Step 2: Convert to fraction form
    2,610.61/3,915.90 = 636.21/x
  3. Step 3: Cross multiply
    2,610.61x = 3,915.90 × 636.21
  4. Step 4: Simplify right side
    2,610.61x = 2,491,344.53
  5. Step 5: Solve for x
    x = 2,491,344.53/2,610.61
  6. Step 6: Final answer
    x = 954.32

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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.