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Finding the Fourth Proportional to 2,231.44, 3,347.08 and 770.64

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Solution

The fourth proportional to 2,231.44, 3,347.08 and 770.64 is: 1,155.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.44 : 3,347.08 = 770.64 : x
  2. Step 2: Convert to fraction form
    2,231.44/3,347.08 = 770.64/x
  3. Step 3: Cross multiply
    2,231.44x = 3,347.08 × 770.64
  4. Step 4: Simplify right side
    2,231.44x = 2,579,393.73
  5. Step 5: Solve for x
    x = 2,579,393.73/2,231.44
  6. Step 6: Final answer
    x = 1,155.93

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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.