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Finding the Fourth Proportional to 662.90, 992.90 and 547.08

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Solution

The fourth proportional to 662.90, 992.90 and 547.08 is: 819.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.90 : 992.90 = 547.08 : x
  2. Step 2: Convert to fraction form
    662.90/992.90 = 547.08/x
  3. Step 3: Cross multiply
    662.90x = 992.90 × 547.08
  4. Step 4: Simplify right side
    662.90x = 543,195.73
  5. Step 5: Solve for x
    x = 543,195.73/662.90
  6. Step 6: Final answer
    x = 819.42

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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.