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Finding the Fourth Proportional to 277.51, 415.72 and 140.65

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Solution

The fourth proportional to 277.51, 415.72 and 140.65 is: 210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.51 : 415.72 = 140.65 : x
  2. Step 2: Convert to fraction form
    277.51/415.72 = 140.65/x
  3. Step 3: Cross multiply
    277.51x = 415.72 × 140.65
  4. Step 4: Simplify right side
    277.51x = 58,471.70
  5. Step 5: Solve for x
    x = 58,471.70/277.51
  6. Step 6: Final answer
    x = 210.70

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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.