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Finding the Fourth Proportional to 251.65, 377.61 and 123.40

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Solution

The fourth proportional to 251.65, 377.61 and 123.40 is: 185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.65 : 377.61 = 123.40 : x
  2. Step 2: Convert to fraction form
    251.65/377.61 = 123.40/x
  3. Step 3: Cross multiply
    251.65x = 377.61 × 123.40
  4. Step 4: Simplify right side
    251.65x = 46,597.08
  5. Step 5: Solve for x
    x = 46,597.08/251.65
  6. Step 6: Final answer
    x = 185.17

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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.