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Finding the Fourth Proportional to 885.07, 1,221.33 and 492.04

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Solution

The fourth proportional to 885.07, 1,221.33 and 492.04 is: 678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.07 : 1,221.33 = 492.04 : x
  2. Step 2: Convert to fraction form
    885.07/1,221.33 = 492.04/x
  3. Step 3: Cross multiply
    885.07x = 1,221.33 × 492.04
  4. Step 4: Simplify right side
    885.07x = 600,943.21
  5. Step 5: Solve for x
    x = 600,943.21/885.07
  6. Step 6: Final answer
    x = 678.98

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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.