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Finding the Fourth Proportional to 515.92, 773.56 and 186.70

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Solution

The fourth proportional to 515.92, 773.56 and 186.70 is: 279.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.92 : 773.56 = 186.70 : x
  2. Step 2: Convert to fraction form
    515.92/773.56 = 186.70/x
  3. Step 3: Cross multiply
    515.92x = 773.56 × 186.70
  4. Step 4: Simplify right side
    515.92x = 144,423.65
  5. Step 5: Solve for x
    x = 144,423.65/515.92
  6. Step 6: Final answer
    x = 279.93

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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.