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Finding the Fourth Proportional to 588.50, 812.16 and 339.90

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Solution

The fourth proportional to 588.50, 812.16 and 339.90 is: 469.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.50 : 812.16 = 339.90 : x
  2. Step 2: Convert to fraction form
    588.50/812.16 = 339.90/x
  3. Step 3: Cross multiply
    588.50x = 812.16 × 339.90
  4. Step 4: Simplify right side
    588.50x = 276,053.18
  5. Step 5: Solve for x
    x = 276,053.18/588.50
  6. Step 6: Final answer
    x = 469.08

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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.