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Finding the Fourth Proportional to 1,232.92, 1,700.95 and 813.49

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Solution

The fourth proportional to 1,232.92, 1,700.95 and 813.49 is: 1,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.92 : 1,700.95 = 813.49 : x
  2. Step 2: Convert to fraction form
    1,232.92/1,700.95 = 813.49/x
  3. Step 3: Cross multiply
    1,232.92x = 1,700.95 × 813.49
  4. Step 4: Simplify right side
    1,232.92x = 1,383,705.82
  5. Step 5: Solve for x
    x = 1,383,705.82/1,232.92
  6. Step 6: Final answer
    x = 1,122.30

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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.