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Finding the Fourth Proportional to 345.94, 518.91 and 89.44

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Solution

The fourth proportional to 345.94, 518.91 and 89.44 is: 134.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.94 : 518.91 = 89.44 : x
  2. Step 2: Convert to fraction form
    345.94/518.91 = 89.44/x
  3. Step 3: Cross multiply
    345.94x = 518.91 × 89.44
  4. Step 4: Simplify right side
    345.94x = 46,409.68
  5. Step 5: Solve for x
    x = 46,409.68/345.94
  6. Step 6: Final answer
    x = 134.16

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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.