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Finding the Fourth Proportional to 588.69, 812.39 and 355.95

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Solution

The fourth proportional to 588.69, 812.39 and 355.95 is: 491.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.69 : 812.39 = 355.95 : x
  2. Step 2: Convert to fraction form
    588.69/812.39 = 355.95/x
  3. Step 3: Cross multiply
    588.69x = 812.39 × 355.95
  4. Step 4: Simplify right side
    588.69x = 289,170.22
  5. Step 5: Solve for x
    x = 289,170.22/588.69
  6. Step 6: Final answer
    x = 491.21

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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.