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Finding the Fourth Proportional to 152.11, 228.25 and 140.50

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Solution

The fourth proportional to 152.11, 228.25 and 140.50 is: 210.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.11 : 228.25 = 140.50 : x
  2. Step 2: Convert to fraction form
    152.11/228.25 = 140.50/x
  3. Step 3: Cross multiply
    152.11x = 228.25 × 140.50
  4. Step 4: Simplify right side
    152.11x = 32,069.59
  5. Step 5: Solve for x
    x = 32,069.59/152.11
  6. Step 6: Final answer
    x = 210.83

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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.