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Finding the Fourth Proportional to 2,231.40, 3,348.64 and 770.56

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Solution

The fourth proportional to 2,231.40, 3,348.64 and 770.56 is: 1,156.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.40 : 3,348.64 = 770.56 : x
  2. Step 2: Convert to fraction form
    2,231.40/3,348.64 = 770.56/x
  3. Step 3: Cross multiply
    2,231.40x = 3,348.64 × 770.56
  4. Step 4: Simplify right side
    2,231.40x = 2,580,339.47
  5. Step 5: Solve for x
    x = 2,580,339.47/2,231.40
  6. Step 6: Final answer
    x = 1,156.38

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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.