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Finding the Fourth Proportional to 2,961.73, 4,442.71 and 987.54

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Solution

The fourth proportional to 2,961.73, 4,442.71 and 987.54 is: 1,481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961.73 : 4,442.71 = 987.54 : x
  2. Step 2: Convert to fraction form
    2,961.73/4,442.71 = 987.54/x
  3. Step 3: Cross multiply
    2,961.73x = 4,442.71 × 987.54
  4. Step 4: Simplify right side
    2,961.73x = 4,387,353.83
  5. Step 5: Solve for x
    x = 4,387,353.83/2,961.73
  6. Step 6: Final answer
    x = 1,481.35

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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.