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Finding the Fourth Proportional to 1,296.19, 1,787.70 and 798.67

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Solution

The fourth proportional to 1,296.19, 1,787.70 and 798.67 is: 1,101.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.19 : 1,787.70 = 798.67 : x
  2. Step 2: Convert to fraction form
    1,296.19/1,787.70 = 798.67/x
  3. Step 3: Cross multiply
    1,296.19x = 1,787.70 × 798.67
  4. Step 4: Simplify right side
    1,296.19x = 1,427,782.36
  5. Step 5: Solve for x
    x = 1,427,782.36/1,296.19
  6. Step 6: Final answer
    x = 1,101.52

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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.