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Finding the Fourth Proportional to 251.88, 347.30 and 228.57

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Solution

The fourth proportional to 251.88, 347.30 and 228.57 is: 315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.88 : 347.30 = 228.57 : x
  2. Step 2: Convert to fraction form
    251.88/347.30 = 228.57/x
  3. Step 3: Cross multiply
    251.88x = 347.30 × 228.57
  4. Step 4: Simplify right side
    251.88x = 79,381.22
  5. Step 5: Solve for x
    x = 79,381.22/251.88
  6. Step 6: Final answer
    x = 315.15

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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.