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Finding the Fourth Proportional to 392.64, 586.75 and 343.44

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Solution

The fourth proportional to 392.64, 586.75 and 343.44 is: 513.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.64 : 586.75 = 343.44 : x
  2. Step 2: Convert to fraction form
    392.64/586.75 = 343.44/x
  3. Step 3: Cross multiply
    392.64x = 586.75 × 343.44
  4. Step 4: Simplify right side
    392.64x = 201,513.42
  5. Step 5: Solve for x
    x = 201,513.42/392.64
  6. Step 6: Final answer
    x = 513.23

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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.