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Finding the Fourth Proportional to 306.60, 425.04 and 290.16

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Solution

The fourth proportional to 306.60, 425.04 and 290.16 is: 402.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.60 : 425.04 = 290.16 : x
  2. Step 2: Convert to fraction form
    306.60/425.04 = 290.16/x
  3. Step 3: Cross multiply
    306.60x = 425.04 × 290.16
  4. Step 4: Simplify right side
    306.60x = 123,329.61
  5. Step 5: Solve for x
    x = 123,329.61/306.60
  6. Step 6: Final answer
    x = 402.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.