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Finding the Fourth Proportional to 1,611.33, 2,417.28 and 515.44

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Solution

The fourth proportional to 1,611.33, 2,417.28 and 515.44 is: 773.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.33 : 2,417.28 = 515.44 : x
  2. Step 2: Convert to fraction form
    1,611.33/2,417.28 = 515.44/x
  3. Step 3: Cross multiply
    1,611.33x = 2,417.28 × 515.44
  4. Step 4: Simplify right side
    1,611.33x = 1,245,962.80
  5. Step 5: Solve for x
    x = 1,245,962.80/1,611.33
  6. Step 6: Final answer
    x = 773.25

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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.