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Finding the Fourth Proportional to 400.26, 598.80 and 318.25

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Solution

The fourth proportional to 400.26, 598.80 and 318.25 is: 476.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.26 : 598.80 = 318.25 : x
  2. Step 2: Convert to fraction form
    400.26/598.80 = 318.25/x
  3. Step 3: Cross multiply
    400.26x = 598.80 × 318.25
  4. Step 4: Simplify right side
    400.26x = 190,568.10
  5. Step 5: Solve for x
    x = 190,568.10/400.26
  6. Step 6: Final answer
    x = 476.11

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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.