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Finding the Fourth Proportional to 421.48, 631.38 and 334.96

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Solution

The fourth proportional to 421.48, 631.38 and 334.96 is: 501.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.48 : 631.38 = 334.96 : x
  2. Step 2: Convert to fraction form
    421.48/631.38 = 334.96/x
  3. Step 3: Cross multiply
    421.48x = 631.38 × 334.96
  4. Step 4: Simplify right side
    421.48x = 211,487.04
  5. Step 5: Solve for x
    x = 211,487.04/421.48
  6. Step 6: Final answer
    x = 501.77

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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.