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Finding the Fourth Proportional to 684.73, 1,028.99 and 549.19

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Solution

The fourth proportional to 684.73, 1,028.99 and 549.19 is: 825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.73 : 1,028.99 = 549.19 : x
  2. Step 2: Convert to fraction form
    684.73/1,028.99 = 549.19/x
  3. Step 3: Cross multiply
    684.73x = 1,028.99 × 549.19
  4. Step 4: Simplify right side
    684.73x = 565,111.02
  5. Step 5: Solve for x
    x = 565,111.02/684.73
  6. Step 6: Final answer
    x = 825.30

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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.