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Finding the Fourth Proportional to 340.94, 511.20 and 145.89

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Solution

The fourth proportional to 340.94, 511.20 and 145.89 is: 218.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.94 : 511.20 = 145.89 : x
  2. Step 2: Convert to fraction form
    340.94/511.20 = 145.89/x
  3. Step 3: Cross multiply
    340.94x = 511.20 × 145.89
  4. Step 4: Simplify right side
    340.94x = 74,578.97
  5. Step 5: Solve for x
    x = 74,578.97/340.94
  6. Step 6: Final answer
    x = 218.74

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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.