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Finding the Fourth Proportional to 885.01, 1,221.36 and 492.04

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Solution

The fourth proportional to 885.01, 1,221.36 and 492.04 is: 679.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.01 : 1,221.36 = 492.04 : x
  2. Step 2: Convert to fraction form
    885.01/1,221.36 = 492.04/x
  3. Step 3: Cross multiply
    885.01x = 1,221.36 × 492.04
  4. Step 4: Simplify right side
    885.01x = 600,957.97
  5. Step 5: Solve for x
    x = 600,957.97/885.01
  6. Step 6: Final answer
    x = 679.04

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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.