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Finding the Fourth Proportional to 1,412.94, 1,949.50 and 823.12

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Solution

The fourth proportional to 1,412.94, 1,949.50 and 823.12 is: 1,135.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.94 : 1,949.50 = 823.12 : x
  2. Step 2: Convert to fraction form
    1,412.94/1,949.50 = 823.12/x
  3. Step 3: Cross multiply
    1,412.94x = 1,949.50 × 823.12
  4. Step 4: Simplify right side
    1,412.94x = 1,604,672.44
  5. Step 5: Solve for x
    x = 1,604,672.44/1,412.94
  6. Step 6: Final answer
    x = 1,135.70

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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.