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Finding the Fourth Proportional to 340.58, 511.31 and 263.61

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Solution

The fourth proportional to 340.58, 511.31 and 263.61 is: 395.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.58 : 511.31 = 263.61 : x
  2. Step 2: Convert to fraction form
    340.58/511.31 = 263.61/x
  3. Step 3: Cross multiply
    340.58x = 511.31 × 263.61
  4. Step 4: Simplify right side
    340.58x = 134,787.09
  5. Step 5: Solve for x
    x = 134,787.09/340.58
  6. Step 6: Final answer
    x = 395.75

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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.