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Finding the Fourth Proportional to 484.83, 728.25 and 392.39

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Solution

The fourth proportional to 484.83, 728.25 and 392.39 is: 589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.83 : 728.25 = 392.39 : x
  2. Step 2: Convert to fraction form
    484.83/728.25 = 392.39/x
  3. Step 3: Cross multiply
    484.83x = 728.25 × 392.39
  4. Step 4: Simplify right side
    484.83x = 285,761.31
  5. Step 5: Solve for x
    x = 285,761.31/484.83
  6. Step 6: Final answer
    x = 589.40

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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.