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Finding the Fourth Proportional to 886.95, 1,223.97 and 493.95

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Solution

The fourth proportional to 886.95, 1,223.97 and 493.95 is: 681.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.95 : 1,223.97 = 493.95 : x
  2. Step 2: Convert to fraction form
    886.95/1,223.97 = 493.95/x
  3. Step 3: Cross multiply
    886.95x = 1,223.97 × 493.95
  4. Step 4: Simplify right side
    886.95x = 604,579.98
  5. Step 5: Solve for x
    x = 604,579.98/886.95
  6. Step 6: Final answer
    x = 681.64

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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.