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Finding the Fourth Proportional to 612.79, 919.31 and 179.95

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Solution

The fourth proportional to 612.79, 919.31 and 179.95 is: 269.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.79 : 919.31 = 179.95 : x
  2. Step 2: Convert to fraction form
    612.79/919.31 = 179.95/x
  3. Step 3: Cross multiply
    612.79x = 919.31 × 179.95
  4. Step 4: Simplify right side
    612.79x = 165,429.83
  5. Step 5: Solve for x
    x = 165,429.83/612.79
  6. Step 6: Final answer
    x = 269.96

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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.