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Finding the Fourth Proportional to 1,412.29, 1,949.24 and 822.92

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Solution

The fourth proportional to 1,412.29, 1,949.24 and 822.92 is: 1,135.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.29 : 1,949.24 = 822.92 : x
  2. Step 2: Convert to fraction form
    1,412.29/1,949.24 = 822.92/x
  3. Step 3: Cross multiply
    1,412.29x = 1,949.24 × 822.92
  4. Step 4: Simplify right side
    1,412.29x = 1,604,068.58
  5. Step 5: Solve for x
    x = 1,604,068.58/1,412.29
  6. Step 6: Final answer
    x = 1,135.79

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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.