Home / 1,486.81-2,051.79-823.66

Finding the Fourth Proportional to 1,486.81, 2,051.79 and 823.66

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Solution

The fourth proportional to 1,486.81, 2,051.79 and 823.66 is: 1,136.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.81 : 2,051.79 = 823.66 : x
  2. Step 2: Convert to fraction form
    1,486.81/2,051.79 = 823.66/x
  3. Step 3: Cross multiply
    1,486.81x = 2,051.79 × 823.66
  4. Step 4: Simplify right side
    1,486.81x = 1,689,969.66
  5. Step 5: Solve for x
    x = 1,689,969.66/1,486.81
  6. Step 6: Final answer
    x = 1,136.64

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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.