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Finding the Fourth Proportional to 588.38, 812.16 and 355.50

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Solution

The fourth proportional to 588.38, 812.16 and 355.50 is: 490.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.38 : 812.16 = 355.50 : x
  2. Step 2: Convert to fraction form
    588.38/812.16 = 355.50/x
  3. Step 3: Cross multiply
    588.38x = 812.16 × 355.50
  4. Step 4: Simplify right side
    588.38x = 288,722.88
  5. Step 5: Solve for x
    x = 288,722.88/588.38
  6. Step 6: Final answer
    x = 490.71

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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.