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Finding the Fourth Proportional to 392.13, 587.43 and 314.75

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Solution

The fourth proportional to 392.13, 587.43 and 314.75 is: 471.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.13 : 587.43 = 314.75 : x
  2. Step 2: Convert to fraction form
    392.13/587.43 = 314.75/x
  3. Step 3: Cross multiply
    392.13x = 587.43 × 314.75
  4. Step 4: Simplify right side
    392.13x = 184,895.06
  5. Step 5: Solve for x
    x = 184,895.06/392.13
  6. Step 6: Final answer
    x = 471.51

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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.