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Finding the Fourth Proportional to 152.97, 228.83 and 139.46

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Solution

The fourth proportional to 152.97, 228.83 and 139.46 is: 208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.97 : 228.83 = 139.46 : x
  2. Step 2: Convert to fraction form
    152.97/228.83 = 139.46/x
  3. Step 3: Cross multiply
    152.97x = 228.83 × 139.46
  4. Step 4: Simplify right side
    152.97x = 31,910.79
  5. Step 5: Solve for x
    x = 31,910.79/152.97
  6. Step 6: Final answer
    x = 208.61

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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.