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Finding the Fourth Proportional to 886.81, 1,223.82 and 493.84

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Solution

The fourth proportional to 886.81, 1,223.82 and 493.84 is: 681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.81 : 1,223.82 = 493.84 : x
  2. Step 2: Convert to fraction form
    886.81/1,223.82 = 493.84/x
  3. Step 3: Cross multiply
    886.81x = 1,223.82 × 493.84
  4. Step 4: Simplify right side
    886.81x = 604,371.27
  5. Step 5: Solve for x
    x = 604,371.27/886.81
  6. Step 6: Final answer
    x = 681.51

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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.