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Finding the Fourth Proportional to 235.76, 325.34 and 130.86

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Solution

The fourth proportional to 235.76, 325.34 and 130.86 is: 180.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.76 : 325.34 = 130.86 : x
  2. Step 2: Convert to fraction form
    235.76/325.34 = 130.86/x
  3. Step 3: Cross multiply
    235.76x = 325.34 × 130.86
  4. Step 4: Simplify right side
    235.76x = 42,572.87
  5. Step 5: Solve for x
    x = 42,572.87/235.76
  6. Step 6: Final answer
    x = 180.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.