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Finding the Fourth Proportional to 885.15, 1,221.84 and 675.27

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Solution

The fourth proportional to 885.15, 1,221.84 and 675.27 is: 932.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.15 : 1,221.84 = 675.27 : x
  2. Step 2: Convert to fraction form
    885.15/1,221.84 = 675.27/x
  3. Step 3: Cross multiply
    885.15x = 1,221.84 × 675.27
  4. Step 4: Simplify right side
    885.15x = 825,071.90
  5. Step 5: Solve for x
    x = 825,071.90/885.15
  6. Step 6: Final answer
    x = 932.13

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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.