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Finding the Fourth Proportional to 886.86, 1,223.84 and 493.88

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Solution

The fourth proportional to 886.86, 1,223.84 and 493.88 is: 681.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.86 : 1,223.84 = 493.88 : x
  2. Step 2: Convert to fraction form
    886.86/1,223.84 = 493.88/x
  3. Step 3: Cross multiply
    886.86x = 1,223.84 × 493.88
  4. Step 4: Simplify right side
    886.86x = 604,425.21
  5. Step 5: Solve for x
    x = 604,425.21/886.86
  6. Step 6: Final answer
    x = 681.53

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1.5x scale

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.