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Finding the Fourth Proportional to 588.80, 812.60 and 355.88

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Solution

The fourth proportional to 588.80, 812.60 and 355.88 is: 491.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.80 : 812.60 = 355.88 : x
  2. Step 2: Convert to fraction form
    588.80/812.60 = 355.88/x
  3. Step 3: Cross multiply
    588.80x = 812.60 × 355.88
  4. Step 4: Simplify right side
    588.80x = 289,182.25
  5. Step 5: Solve for x
    x = 289,182.25/588.80
  6. Step 6: Final answer
    x = 491.14

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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.