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Finding the Fourth Proportional to 885.03, 1,221.91 and 549.29

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Solution

The fourth proportional to 885.03, 1,221.91 and 549.29 is: 758.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.03 : 1,221.91 = 549.29 : x
  2. Step 2: Convert to fraction form
    885.03/1,221.91 = 549.29/x
  3. Step 3: Cross multiply
    885.03x = 1,221.91 × 549.29
  4. Step 4: Simplify right side
    885.03x = 671,182.94
  5. Step 5: Solve for x
    x = 671,182.94/885.03
  6. Step 6: Final answer
    x = 758.38

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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.