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Finding the Fourth Proportional to 843.90, 1,164.37 and 549.06

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Solution

The fourth proportional to 843.90, 1,164.37 and 549.06 is: 757.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.90 : 1,164.37 = 549.06 : x
  2. Step 2: Convert to fraction form
    843.90/1,164.37 = 549.06/x
  3. Step 3: Cross multiply
    843.90x = 1,164.37 × 549.06
  4. Step 4: Simplify right side
    843.90x = 639,308.99
  5. Step 5: Solve for x
    x = 639,308.99/843.90
  6. Step 6: Final answer
    x = 757.56

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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.