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Finding the Fourth Proportional to 402.72, 600.32 and 389.22

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Solution

The fourth proportional to 402.72, 600.32 and 389.22 is: 580.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.72 : 600.32 = 389.22 : x
  2. Step 2: Convert to fraction form
    402.72/600.32 = 389.22/x
  3. Step 3: Cross multiply
    402.72x = 600.32 × 389.22
  4. Step 4: Simplify right side
    402.72x = 233,654.60
  5. Step 5: Solve for x
    x = 233,654.60/402.72
  6. Step 6: Final answer
    x = 580.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.