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Finding the Fourth Proportional to 493.32, 739.44 and 420.96

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Solution

The fourth proportional to 493.32, 739.44 and 420.96 is: 630.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.32 : 739.44 = 420.96 : x
  2. Step 2: Convert to fraction form
    493.32/739.44 = 420.96/x
  3. Step 3: Cross multiply
    493.32x = 739.44 × 420.96
  4. Step 4: Simplify right side
    493.32x = 311,274.66
  5. Step 5: Solve for x
    x = 311,274.66/493.32
  6. Step 6: Final answer
    x = 630.98

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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.