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Finding the Fourth Proportional to 392.85, 586.44 and 344.25

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Solution

The fourth proportional to 392.85, 586.44 and 344.25 is: 513.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.85 : 586.44 = 344.25 : x
  2. Step 2: Convert to fraction form
    392.85/586.44 = 344.25/x
  3. Step 3: Cross multiply
    392.85x = 586.44 × 344.25
  4. Step 4: Simplify right side
    392.85x = 201,881.97
  5. Step 5: Solve for x
    x = 201,881.97/392.85
  6. Step 6: Final answer
    x = 513.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.