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Finding the Fourth Proportional to 1,964.89, 2,948.60 and 810.61

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Solution

The fourth proportional to 1,964.89, 2,948.60 and 810.61 is: 1,216.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.89 : 2,948.60 = 810.61 : x
  2. Step 2: Convert to fraction form
    1,964.89/2,948.60 = 810.61/x
  3. Step 3: Cross multiply
    1,964.89x = 2,948.60 × 810.61
  4. Step 4: Simplify right side
    1,964.89x = 2,390,160.59
  5. Step 5: Solve for x
    x = 2,390,160.59/1,964.89
  6. Step 6: Final answer
    x = 1,216.43

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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.