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Finding the Fourth Proportional to 152.49, 228.72 and 55.05

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Solution

The fourth proportional to 152.49, 228.72 and 55.05 is: 82.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.49 : 228.72 = 55.05 : x
  2. Step 2: Convert to fraction form
    152.49/228.72 = 55.05/x
  3. Step 3: Cross multiply
    152.49x = 228.72 × 55.05
  4. Step 4: Simplify right side
    152.49x = 12,591.04
  5. Step 5: Solve for x
    x = 12,591.04/152.49
  6. Step 6: Final answer
    x = 82.57

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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.