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Finding the Fourth Proportional to 656.96, 989.36 and 549.44

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Solution

The fourth proportional to 656.96, 989.36 and 549.44 is: 827.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.96 : 989.36 = 549.44 : x
  2. Step 2: Convert to fraction form
    656.96/989.36 = 549.44/x
  3. Step 3: Cross multiply
    656.96x = 989.36 × 549.44
  4. Step 4: Simplify right side
    656.96x = 543,593.96
  5. Step 5: Solve for x
    x = 543,593.96/656.96
  6. Step 6: Final answer
    x = 827.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.