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Finding the Fourth Proportional to 2,560.82, 3,840.44 and 711.43

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Solution

The fourth proportional to 2,560.82, 3,840.44 and 711.43 is: 1,066.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,560.82 : 3,840.44 = 711.43 : x
  2. Step 2: Convert to fraction form
    2,560.82/3,840.44 = 711.43/x
  3. Step 3: Cross multiply
    2,560.82x = 3,840.44 × 711.43
  4. Step 4: Simplify right side
    2,560.82x = 2,732,214.67
  5. Step 5: Solve for x
    x = 2,732,214.67/2,560.82
  6. Step 6: Final answer
    x = 1,066.93

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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.