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Finding the Fourth Proportional to 389.31, 582.26 and 346.28

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Solution

The fourth proportional to 389.31, 582.26 and 346.28 is: 517.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.31 : 582.26 = 346.28 : x
  2. Step 2: Convert to fraction form
    389.31/582.26 = 346.28/x
  3. Step 3: Cross multiply
    389.31x = 582.26 × 346.28
  4. Step 4: Simplify right side
    389.31x = 201,620.35
  5. Step 5: Solve for x
    x = 201,620.35/389.31
  6. Step 6: Final answer
    x = 517.90

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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.