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Finding the Fourth Proportional to 500.08, 748.93 and 421.63

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Solution

The fourth proportional to 500.08, 748.93 and 421.63 is: 631.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.08 : 748.93 = 421.63 : x
  2. Step 2: Convert to fraction form
    500.08/748.93 = 421.63/x
  3. Step 3: Cross multiply
    500.08x = 748.93 × 421.63
  4. Step 4: Simplify right side
    500.08x = 315,771.36
  5. Step 5: Solve for x
    x = 315,771.36/500.08
  6. Step 6: Final answer
    x = 631.44

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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.