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Finding the Fourth Proportional to 886.21, 1,222.94 and 487.88

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Solution

The fourth proportional to 886.21, 1,222.94 and 487.88 is: 673.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.21 : 1,222.94 = 487.88 : x
  2. Step 2: Convert to fraction form
    886.21/1,222.94 = 487.88/x
  3. Step 3: Cross multiply
    886.21x = 1,222.94 × 487.88
  4. Step 4: Simplify right side
    886.21x = 596,647.97
  5. Step 5: Solve for x
    x = 596,647.97/886.21
  6. Step 6: Final answer
    x = 673.26

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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.