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Finding the Fourth Proportional to 549.07, 823.54 and 518.57

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Solution

The fourth proportional to 549.07, 823.54 and 518.57 is: 777.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.07 : 823.54 = 518.57 : x
  2. Step 2: Convert to fraction form
    549.07/823.54 = 518.57/x
  3. Step 3: Cross multiply
    549.07x = 823.54 × 518.57
  4. Step 4: Simplify right side
    549.07x = 427,066.28
  5. Step 5: Solve for x
    x = 427,066.28/549.07
  6. Step 6: Final answer
    x = 777.80

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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.