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Finding the Fourth Proportional to 235.79, 325.39 and 130.87

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Solution

The fourth proportional to 235.79, 325.39 and 130.87 is: 180.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.79 : 325.39 = 130.87 : x
  2. Step 2: Convert to fraction form
    235.79/325.39 = 130.87/x
  3. Step 3: Cross multiply
    235.79x = 325.39 × 130.87
  4. Step 4: Simplify right side
    235.79x = 42,582.65
  5. Step 5: Solve for x
    x = 42,582.65/235.79
  6. Step 6: Final answer
    x = 180.60

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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.