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Finding the Fourth Proportional to 340.82, 511.23 and 84.32

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Solution

The fourth proportional to 340.82, 511.23 and 84.32 is: 126.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.82 : 511.23 = 84.32 : x
  2. Step 2: Convert to fraction form
    340.82/511.23 = 84.32/x
  3. Step 3: Cross multiply
    340.82x = 511.23 × 84.32
  4. Step 4: Simplify right side
    340.82x = 43,106.91
  5. Step 5: Solve for x
    x = 43,106.91/340.82
  6. Step 6: Final answer
    x = 126.48

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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.