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Finding the Fourth Proportional to 662.20, 1,000.40 and 662.20

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Solution

The fourth proportional to 662.20, 1,000.40 and 662.20 is: 1,000.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.20 : 1,000.40 = 662.20 : x
  2. Step 2: Convert to fraction form
    662.20/1,000.40 = 662.20/x
  3. Step 3: Cross multiply
    662.20x = 1,000.40 × 662.20
  4. Step 4: Simplify right side
    662.20x = 662,464.88
  5. Step 5: Solve for x
    x = 662,464.88/662.20
  6. Step 6: Final answer
    x = 1,000.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.