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Finding the Fourth Proportional to 310.29, 427.98 and 185.86

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Solution

The fourth proportional to 310.29, 427.98 and 185.86 is: 256.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.29 : 427.98 = 185.86 : x
  2. Step 2: Convert to fraction form
    310.29/427.98 = 185.86/x
  3. Step 3: Cross multiply
    310.29x = 427.98 × 185.86
  4. Step 4: Simplify right side
    310.29x = 79,544.36
  5. Step 5: Solve for x
    x = 79,544.36/310.29
  6. Step 6: Final answer
    x = 256.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.