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Finding the Fourth Proportional to 486.02, 727.32 and 398.28

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Solution

The fourth proportional to 486.02, 727.32 and 398.28 is: 596.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.02 : 727.32 = 398.28 : x
  2. Step 2: Convert to fraction form
    486.02/727.32 = 398.28/x
  3. Step 3: Cross multiply
    486.02x = 727.32 × 398.28
  4. Step 4: Simplify right side
    486.02x = 289,677.01
  5. Step 5: Solve for x
    x = 289,677.01/486.02
  6. Step 6: Final answer
    x = 596.02

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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.