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Finding the Fourth Proportional to 1,936.29, 2,904.95 and 840.87

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Solution

The fourth proportional to 1,936.29, 2,904.95 and 840.87 is: 1,261.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,936.29 : 2,904.95 = 840.87 : x
  2. Step 2: Convert to fraction form
    1,936.29/2,904.95 = 840.87/x
  3. Step 3: Cross multiply
    1,936.29x = 2,904.95 × 840.87
  4. Step 4: Simplify right side
    1,936.29x = 2,442,685.31
  5. Step 5: Solve for x
    x = 2,442,685.31/1,936.29
  6. Step 6: Final answer
    x = 1,261.53

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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.