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Finding the Fourth Proportional to 592.20, 817.21 and 356.28

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Solution

The fourth proportional to 592.20, 817.21 and 356.28 is: 491.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    592.20 : 817.21 = 356.28 : x
  2. Step 2: Convert to fraction form
    592.20/817.21 = 356.28/x
  3. Step 3: Cross multiply
    592.20x = 817.21 × 356.28
  4. Step 4: Simplify right side
    592.20x = 291,155.58
  5. Step 5: Solve for x
    x = 291,155.58/592.20
  6. Step 6: Final answer
    x = 491.65

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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.