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Finding the Fourth Proportional to 389.46, 582.47 and 346.43

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Solution

The fourth proportional to 389.46, 582.47 and 346.43 is: 518.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.46 : 582.47 = 346.43 : x
  2. Step 2: Convert to fraction form
    389.46/582.47 = 346.43/x
  3. Step 3: Cross multiply
    389.46x = 582.47 × 346.43
  4. Step 4: Simplify right side
    389.46x = 201,785.08
  5. Step 5: Solve for x
    x = 201,785.08/389.46
  6. Step 6: Final answer
    x = 518.12

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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.