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Finding the Fourth Proportional to 552.74, 829.63 and 206.40

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Solution

The fourth proportional to 552.74, 829.63 and 206.40 is: 309.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.74 : 829.63 = 206.40 : x
  2. Step 2: Convert to fraction form
    552.74/829.63 = 206.40/x
  3. Step 3: Cross multiply
    552.74x = 829.63 × 206.40
  4. Step 4: Simplify right side
    552.74x = 171,233.04
  5. Step 5: Solve for x
    x = 171,233.04/552.74
  6. Step 6: Final answer
    x = 309.79

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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.