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Finding the Fourth Proportional to 1,881.64, 2,822.43 and 513.64

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Solution

The fourth proportional to 1,881.64, 2,822.43 and 513.64 is: 770.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.64 : 2,822.43 = 513.64 : x
  2. Step 2: Convert to fraction form
    1,881.64/2,822.43 = 513.64/x
  3. Step 3: Cross multiply
    1,881.64x = 2,822.43 × 513.64
  4. Step 4: Simplify right side
    1,881.64x = 1,449,712.95
  5. Step 5: Solve for x
    x = 1,449,712.95/1,881.64
  6. Step 6: Final answer
    x = 770.45

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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.