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Finding the Fourth Proportional to 663.42, 993.36 and 456.98

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Solution

The fourth proportional to 663.42, 993.36 and 456.98 is: 684.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.42 : 993.36 = 456.98 : x
  2. Step 2: Convert to fraction form
    663.42/993.36 = 456.98/x
  3. Step 3: Cross multiply
    663.42x = 993.36 × 456.98
  4. Step 4: Simplify right side
    663.42x = 453,942.40
  5. Step 5: Solve for x
    x = 453,942.40/663.42
  6. Step 6: Final answer
    x = 684.24

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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.