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Finding the Fourth Proportional to 592.38, 817.20 and 395.64

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Solution

The fourth proportional to 592.38, 817.20 and 395.64 is: 545.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    592.38 : 817.20 = 395.64 : x
  2. Step 2: Convert to fraction form
    592.38/817.20 = 395.64/x
  3. Step 3: Cross multiply
    592.38x = 817.20 × 395.64
  4. Step 4: Simplify right side
    592.38x = 323,317.01
  5. Step 5: Solve for x
    x = 323,317.01/592.38
  6. Step 6: Final answer
    x = 545.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.