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Finding the Fourth Proportional to 881.82, 1,215.77 and 549.65

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Solution

The fourth proportional to 881.82, 1,215.77 and 549.65 is: 757.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.82 : 1,215.77 = 549.65 : x
  2. Step 2: Convert to fraction form
    881.82/1,215.77 = 549.65/x
  3. Step 3: Cross multiply
    881.82x = 1,215.77 × 549.65
  4. Step 4: Simplify right side
    881.82x = 668,239.15
  5. Step 5: Solve for x
    x = 668,239.15/881.82
  6. Step 6: Final answer
    x = 757.80

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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.