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Finding the Fourth Proportional to 662.77, 995.57 and 402.90

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Solution

The fourth proportional to 662.77, 995.57 and 402.90 is: 605.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.77 : 995.57 = 402.90 : x
  2. Step 2: Convert to fraction form
    662.77/995.57 = 402.90/x
  3. Step 3: Cross multiply
    662.77x = 995.57 × 402.90
  4. Step 4: Simplify right side
    662.77x = 401,115.15
  5. Step 5: Solve for x
    x = 401,115.15/662.77
  6. Step 6: Final answer
    x = 605.21

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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.