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Finding the Fourth Proportional to 372.88, 558.06 and 228.70

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Solution

The fourth proportional to 372.88, 558.06 and 228.70 is: 342.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.88 : 558.06 = 228.70 : x
  2. Step 2: Convert to fraction form
    372.88/558.06 = 228.70/x
  3. Step 3: Cross multiply
    372.88x = 558.06 × 228.70
  4. Step 4: Simplify right side
    372.88x = 127,628.32
  5. Step 5: Solve for x
    x = 127,628.32/372.88
  6. Step 6: Final answer
    x = 342.28

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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.