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Finding the Fourth Proportional to 684.96, 1,028.24 and 549.68

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Solution

The fourth proportional to 684.96, 1,028.24 and 549.68 is: 825.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.96 : 1,028.24 = 549.68 : x
  2. Step 2: Convert to fraction form
    684.96/1,028.24 = 549.68/x
  3. Step 3: Cross multiply
    684.96x = 1,028.24 × 549.68
  4. Step 4: Simplify right side
    684.96x = 565,202.96
  5. Step 5: Solve for x
    x = 565,202.96/684.96
  6. Step 6: Final answer
    x = 825.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.