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Finding the Fourth Proportional to 552.64, 822.72 and 549.40

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Solution

The fourth proportional to 552.64, 822.72 and 549.40 is: 817.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.64 : 822.72 = 549.40 : x
  2. Step 2: Convert to fraction form
    552.64/822.72 = 549.40/x
  3. Step 3: Cross multiply
    552.64x = 822.72 × 549.40
  4. Step 4: Simplify right side
    552.64x = 452,002.37
  5. Step 5: Solve for x
    x = 452,002.37/552.64
  6. Step 6: Final answer
    x = 817.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.