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Finding the Fourth Proportional to 296.47, 408.25 and 290.08

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Solution

The fourth proportional to 296.47, 408.25 and 290.08 is: 399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.47 : 408.25 = 290.08 : x
  2. Step 2: Convert to fraction form
    296.47/408.25 = 290.08/x
  3. Step 3: Cross multiply
    296.47x = 408.25 × 290.08
  4. Step 4: Simplify right side
    296.47x = 118,425.16
  5. Step 5: Solve for x
    x = 118,425.16/296.47
  6. Step 6: Final answer
    x = 399.45

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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.