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Finding the Fourth Proportional to 588.60, 811.89 and 355.50

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Solution

The fourth proportional to 588.60, 811.89 and 355.50 is: 490.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.60 : 811.89 = 355.50 : x
  2. Step 2: Convert to fraction form
    588.60/811.89 = 355.50/x
  3. Step 3: Cross multiply
    588.60x = 811.89 × 355.50
  4. Step 4: Simplify right side
    588.60x = 288,626.90
  5. Step 5: Solve for x
    x = 288,626.90/588.60
  6. Step 6: Final answer
    x = 490.36

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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.