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Finding the Fourth Proportional to 340.97, 511.29 and 145.90

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Solution

The fourth proportional to 340.97, 511.29 and 145.90 is: 218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.97 : 511.29 = 145.90 : x
  2. Step 2: Convert to fraction form
    340.97/511.29 = 145.90/x
  3. Step 3: Cross multiply
    340.97x = 511.29 × 145.90
  4. Step 4: Simplify right side
    340.97x = 74,597.21
  5. Step 5: Solve for x
    x = 74,597.21/340.97
  6. Step 6: Final answer
    x = 218.78

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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.