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Finding the Fourth Proportional to 1,515.24, 2,091 and 852

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Solution

The fourth proportional to 1,515.24, 2,091 and 852 is: 1,175.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.24 : 2,091 = 852 : x
  2. Step 2: Convert to fraction form
    1,515.24/2,091 = 852/x
  3. Step 3: Cross multiply
    1,515.24x = 2,091 × 852
  4. Step 4: Simplify right side
    1,515.24x = 1,781,532
  5. Step 5: Solve for x
    x = 1,781,532/1,515.24
  6. Step 6: Final answer
    x = 1,175.74

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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.