Home / 1,486.94-2,051.92-823.78

Finding the Fourth Proportional to 1,486.94, 2,051.92 and 823.78

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Solution

The fourth proportional to 1,486.94, 2,051.92 and 823.78 is: 1,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.94 : 2,051.92 = 823.78 : x
  2. Step 2: Convert to fraction form
    1,486.94/2,051.92 = 823.78/x
  3. Step 3: Cross multiply
    1,486.94x = 2,051.92 × 823.78
  4. Step 4: Simplify right side
    1,486.94x = 1,690,330.66
  5. Step 5: Solve for x
    x = 1,690,330.66/1,486.94
  6. Step 6: Final answer
    x = 1,136.78

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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.