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Finding the Fourth Proportional to 886.13, 1,222.56 and 554.75

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Solution

The fourth proportional to 886.13, 1,222.56 and 554.75 is: 765.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.13 : 1,222.56 = 554.75 : x
  2. Step 2: Convert to fraction form
    886.13/1,222.56 = 554.75/x
  3. Step 3: Cross multiply
    886.13x = 1,222.56 × 554.75
  4. Step 4: Simplify right side
    886.13x = 678,209.05
  5. Step 5: Solve for x
    x = 678,209.05/886.13
  6. Step 6: Final answer
    x = 765.36

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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.