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Finding the Fourth Proportional to 588.58, 812.32 and 339.90

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Solution

The fourth proportional to 588.58, 812.32 and 339.90 is: 469.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.58 : 812.32 = 339.90 : x
  2. Step 2: Convert to fraction form
    588.58/812.32 = 339.90/x
  3. Step 3: Cross multiply
    588.58x = 812.32 × 339.90
  4. Step 4: Simplify right side
    588.58x = 276,107.57
  5. Step 5: Solve for x
    x = 276,107.57/588.58
  6. Step 6: Final answer
    x = 469.11

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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.