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Finding the Fourth Proportional to 401.96, 602.99 and 113.40

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Solution

The fourth proportional to 401.96, 602.99 and 113.40 is: 170.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.96 : 602.99 = 113.40 : x
  2. Step 2: Convert to fraction form
    401.96/602.99 = 113.40/x
  3. Step 3: Cross multiply
    401.96x = 602.99 × 113.40
  4. Step 4: Simplify right side
    401.96x = 68,378.50
  5. Step 5: Solve for x
    x = 68,378.50/401.96
  6. Step 6: Final answer
    x = 170.11

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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.