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Finding the Fourth Proportional to 1,231.93, 1,846.21 and 711.60

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Solution

The fourth proportional to 1,231.93, 1,846.21 and 711.60 is: 1,066.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.93 : 1,846.21 = 711.60 : x
  2. Step 2: Convert to fraction form
    1,231.93/1,846.21 = 711.60/x
  3. Step 3: Cross multiply
    1,231.93x = 1,846.21 × 711.60
  4. Step 4: Simplify right side
    1,231.93x = 1,313,763.04
  5. Step 5: Solve for x
    x = 1,313,763.04/1,231.93
  6. Step 6: Final answer
    x = 1,066.43

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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.