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Finding the Fourth Proportional to 400.19, 552.32 and 290.03

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Solution

The fourth proportional to 400.19, 552.32 and 290.03 is: 400.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.19 : 552.32 = 290.03 : x
  2. Step 2: Convert to fraction form
    400.19/552.32 = 290.03/x
  3. Step 3: Cross multiply
    400.19x = 552.32 × 290.03
  4. Step 4: Simplify right side
    400.19x = 160,185.16
  5. Step 5: Solve for x
    x = 160,185.16/400.19
  6. Step 6: Final answer
    x = 400.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.