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Finding the Fourth Proportional to 1,294.94, 1,787.42 and 798.30

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Solution

The fourth proportional to 1,294.94, 1,787.42 and 798.30 is: 1,101.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.94 : 1,787.42 = 798.30 : x
  2. Step 2: Convert to fraction form
    1,294.94/1,787.42 = 798.30/x
  3. Step 3: Cross multiply
    1,294.94x = 1,787.42 × 798.30
  4. Step 4: Simplify right side
    1,294.94x = 1,426,893.39
  5. Step 5: Solve for x
    x = 1,426,893.39/1,294.94
  6. Step 6: Final answer
    x = 1,101.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.