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Finding the Fourth Proportional to 2,577.42, 3,865.62 and 822.35

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Solution

The fourth proportional to 2,577.42, 3,865.62 and 822.35 is: 1,233.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,577.42 : 3,865.62 = 822.35 : x
  2. Step 2: Convert to fraction form
    2,577.42/3,865.62 = 822.35/x
  3. Step 3: Cross multiply
    2,577.42x = 3,865.62 × 822.35
  4. Step 4: Simplify right side
    2,577.42x = 3,178,905.35
  5. Step 5: Solve for x
    x = 3,178,905.35/2,577.42
  6. Step 6: Final answer
    x = 1,233.37

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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.