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Finding the Fourth Proportional to 401.51, 602.19 and 112.88

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Solution

The fourth proportional to 401.51, 602.19 and 112.88 is: 169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.51 : 602.19 = 112.88 : x
  2. Step 2: Convert to fraction form
    401.51/602.19 = 112.88/x
  3. Step 3: Cross multiply
    401.51x = 602.19 × 112.88
  4. Step 4: Simplify right side
    401.51x = 67,975.21
  5. Step 5: Solve for x
    x = 67,975.21/401.51
  6. Step 6: Final answer
    x = 169.30

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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.