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Finding the Fourth Proportional to 2,646.30, 3,970.11 and 797.37

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Solution

The fourth proportional to 2,646.30, 3,970.11 and 797.37 is: 1,196.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,646.30 : 3,970.11 = 797.37 : x
  2. Step 2: Convert to fraction form
    2,646.30/3,970.11 = 797.37/x
  3. Step 3: Cross multiply
    2,646.30x = 3,970.11 × 797.37
  4. Step 4: Simplify right side
    2,646.30x = 3,165,646.61
  5. Step 5: Solve for x
    x = 3,165,646.61/2,646.30
  6. Step 6: Final answer
    x = 1,196.25

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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.