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Finding the Fourth Proportional to 152.47, 228.77 and 80.31

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Solution

The fourth proportional to 152.47, 228.77 and 80.31 is: 120.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.47 : 228.77 = 80.31 : x
  2. Step 2: Convert to fraction form
    152.47/228.77 = 80.31/x
  3. Step 3: Cross multiply
    152.47x = 228.77 × 80.31
  4. Step 4: Simplify right side
    152.47x = 18,372.52
  5. Step 5: Solve for x
    x = 18,372.52/152.47
  6. Step 6: Final answer
    x = 120.50

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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.