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Finding the Fourth Proportional to 392.82, 586.35 and 346.70

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Solution

The fourth proportional to 392.82, 586.35 and 346.70 is: 517.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.82 : 586.35 = 346.70 : x
  2. Step 2: Convert to fraction form
    392.82/586.35 = 346.70/x
  3. Step 3: Cross multiply
    392.82x = 586.35 × 346.70
  4. Step 4: Simplify right side
    392.82x = 203,284.61
  5. Step 5: Solve for x
    x = 203,284.61/392.82
  6. Step 6: Final answer
    x = 517.50

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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.