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Finding the Fourth Proportional to 2,961.71, 4,442.81 and 770.48

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Solution

The fourth proportional to 2,961.71, 4,442.81 and 770.48 is: 1,155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961.71 : 4,442.81 = 770.48 : x
  2. Step 2: Convert to fraction form
    2,961.71/4,442.81 = 770.48/x
  3. Step 3: Cross multiply
    2,961.71x = 4,442.81 × 770.48
  4. Step 4: Simplify right side
    2,961.71x = 3,423,070.18
  5. Step 5: Solve for x
    x = 3,423,070.18/2,961.71
  6. Step 6: Final answer
    x = 1,155.78

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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.