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Finding the Fourth Proportional to 392.46, 587.83 and 186.40

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Solution

The fourth proportional to 392.46, 587.83 and 186.40 is: 279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.46 : 587.83 = 186.40 : x
  2. Step 2: Convert to fraction form
    392.46/587.83 = 186.40/x
  3. Step 3: Cross multiply
    392.46x = 587.83 × 186.40
  4. Step 4: Simplify right side
    392.46x = 109,572.65
  5. Step 5: Solve for x
    x = 109,572.65/392.46
  6. Step 6: Final answer
    x = 279.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.