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Finding the Fourth Proportional to 400.18, 599.91 and 143.50

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Solution

The fourth proportional to 400.18, 599.91 and 143.50 is: 215.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.18 : 599.91 = 143.50 : x
  2. Step 2: Convert to fraction form
    400.18/599.91 = 143.50/x
  3. Step 3: Cross multiply
    400.18x = 599.91 × 143.50
  4. Step 4: Simplify right side
    400.18x = 86,087.09
  5. Step 5: Solve for x
    x = 86,087.09/400.18
  6. Step 6: Final answer
    x = 215.12

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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.