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Finding the Fourth Proportional to 588.50, 812.14 and 355.58

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Solution

The fourth proportional to 588.50, 812.14 and 355.58 is: 490.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.50 : 812.14 = 355.58 : x
  2. Step 2: Convert to fraction form
    588.50/812.14 = 355.58/x
  3. Step 3: Cross multiply
    588.50x = 812.14 × 355.58
  4. Step 4: Simplify right side
    588.50x = 288,780.74
  5. Step 5: Solve for x
    x = 288,780.74/588.50
  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.