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Finding the Fourth Proportional to 194.08, 291.28 and 145.28

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Solution

The fourth proportional to 194.08, 291.28 and 145.28 is: 218.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.08 : 291.28 = 145.28 : x
  2. Step 2: Convert to fraction form
    194.08/291.28 = 145.28/x
  3. Step 3: Cross multiply
    194.08x = 291.28 × 145.28
  4. Step 4: Simplify right side
    194.08x = 42,317.16
  5. Step 5: Solve for x
    x = 42,317.16/194.08
  6. Step 6: Final answer
    x = 218.04

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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.