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Finding the Fourth Proportional to 588.72, 812.39 and 339.99

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Solution

The fourth proportional to 588.72, 812.39 and 339.99 is: 469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.72 : 812.39 = 339.99 : x
  2. Step 2: Convert to fraction form
    588.72/812.39 = 339.99/x
  3. Step 3: Cross multiply
    588.72x = 812.39 × 339.99
  4. Step 4: Simplify right side
    588.72x = 276,204.48
  5. Step 5: Solve for x
    x = 276,204.48/588.72
  6. Step 6: Final answer
    x = 469.16

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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.