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Finding the Fourth Proportional to 290.16, 398.46 and 248.70

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Solution

The fourth proportional to 290.16, 398.46 and 248.70 is: 341.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.16 : 398.46 = 248.70 : x
  2. Step 2: Convert to fraction form
    290.16/398.46 = 248.70/x
  3. Step 3: Cross multiply
    290.16x = 398.46 × 248.70
  4. Step 4: Simplify right side
    290.16x = 99,097.00
  5. Step 5: Solve for x
    x = 99,097.00/290.16
  6. Step 6: Final answer
    x = 341.53

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.