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Finding the Fourth Proportional to 1,356.40, 1,872.08 and 796.92

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Solution

The fourth proportional to 1,356.40, 1,872.08 and 796.92 is: 1,099.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.40 : 1,872.08 = 796.92 : x
  2. Step 2: Convert to fraction form
    1,356.40/1,872.08 = 796.92/x
  3. Step 3: Cross multiply
    1,356.40x = 1,872.08 × 796.92
  4. Step 4: Simplify right side
    1,356.40x = 1,491,897.99
  5. Step 5: Solve for x
    x = 1,491,897.99/1,356.40
  6. Step 6: Final answer
    x = 1,099.90

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1.5x scale

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.