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Finding the Fourth Proportional to 1,336.79, 1,844.82 and 747.21

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Solution

The fourth proportional to 1,336.79, 1,844.82 and 747.21 is: 1,031.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.79 : 1,844.82 = 747.21 : x
  2. Step 2: Convert to fraction form
    1,336.79/1,844.82 = 747.21/x
  3. Step 3: Cross multiply
    1,336.79x = 1,844.82 × 747.21
  4. Step 4: Simplify right side
    1,336.79x = 1,378,467.95
  5. Step 5: Solve for x
    x = 1,378,467.95/1,336.79
  6. Step 6: Final answer
    x = 1,031.18

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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.