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Finding the Fourth Proportional to 1,878, 2,817.36 and 852

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Solution

The fourth proportional to 1,878, 2,817.36 and 852 is: 1,278.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878 : 2,817.36 = 852 : x
  2. Step 2: Convert to fraction form
    1,878/2,817.36 = 852/x
  3. Step 3: Cross multiply
    1,878x = 2,817.36 × 852
  4. Step 4: Simplify right side
    1,878x = 2,400,390.72
  5. Step 5: Solve for x
    x = 2,400,390.72/1,878
  6. Step 6: Final answer
    x = 1,278.16

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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.