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Finding the Fourth Proportional to 662.10, 993.15 and 456.90

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Solution

The fourth proportional to 662.10, 993.15 and 456.90 is: 685.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.10 : 993.15 = 456.90 : x
  2. Step 2: Convert to fraction form
    662.10/993.15 = 456.90/x
  3. Step 3: Cross multiply
    662.10x = 993.15 × 456.90
  4. Step 4: Simplify right side
    662.10x = 453,770.24
  5. Step 5: Solve for x
    x = 453,770.24/662.10
  6. Step 6: Final answer
    x = 685.35

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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.