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Finding the Fourth Proportional to 2,821, 3,893.16 and 1,875.16

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Solution

The fourth proportional to 2,821, 3,893.16 and 1,875.16 is: 2,587.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821 : 3,893.16 = 1,875.16 : x
  2. Step 2: Convert to fraction form
    2,821/3,893.16 = 1,875.16/x
  3. Step 3: Cross multiply
    2,821x = 3,893.16 × 1,875.16
  4. Step 4: Simplify right side
    2,821x = 7,300,297.91
  5. Step 5: Solve for x
    x = 7,300,297.91/2,821
  6. Step 6: Final answer
    x = 2,587.84

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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.