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Finding the Fourth Proportional to 400.23, 599.91 and 140.00

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Solution

The fourth proportional to 400.23, 599.91 and 140.00 is: 209.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.23 : 599.91 = 140.00 : x
  2. Step 2: Convert to fraction form
    400.23/599.91 = 140.00/x
  3. Step 3: Cross multiply
    400.23x = 599.91 × 140.00
  4. Step 4: Simplify right side
    400.23x = 83,984.40
  5. Step 5: Solve for x
    x = 83,984.40/400.23
  6. Step 6: Final answer
    x = 209.84

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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.