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Finding the Fourth Proportional to 2,560.23, 3,840.42 and 711.48

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Solution

The fourth proportional to 2,560.23, 3,840.42 and 711.48 is: 1,067.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,560.23 : 3,840.42 = 711.48 : x
  2. Step 2: Convert to fraction form
    2,560.23/3,840.42 = 711.48/x
  3. Step 3: Cross multiply
    2,560.23x = 3,840.42 × 711.48
  4. Step 4: Simplify right side
    2,560.23x = 2,732,378.46
  5. Step 5: Solve for x
    x = 2,732,378.46/2,560.23
  6. Step 6: Final answer
    x = 1,067.24

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1.5x scale

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.