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Finding the Fourth Proportional to 340.90, 511.39 and 124.45

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Solution

The fourth proportional to 340.90, 511.39 and 124.45 is: 186.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.90 : 511.39 = 124.45 : x
  2. Step 2: Convert to fraction form
    340.90/511.39 = 124.45/x
  3. Step 3: Cross multiply
    340.90x = 511.39 × 124.45
  4. Step 4: Simplify right side
    340.90x = 63,642.49
  5. Step 5: Solve for x
    x = 63,642.49/340.90
  6. Step 6: Final answer
    x = 186.69

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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.