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Finding the Fourth Proportional to 662.18, 993.06 and 531.90

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Solution

The fourth proportional to 662.18, 993.06 and 531.90 is: 797.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.18 : 993.06 = 531.90 : x
  2. Step 2: Convert to fraction form
    662.18/993.06 = 531.90/x
  3. Step 3: Cross multiply
    662.18x = 993.06 × 531.90
  4. Step 4: Simplify right side
    662.18x = 528,208.61
  5. Step 5: Solve for x
    x = 528,208.61/662.18
  6. Step 6: Final answer
    x = 797.69

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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.