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Finding the Fourth Proportional to 306.04, 425.18 and 303.08

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Solution

The fourth proportional to 306.04, 425.18 and 303.08 is: 421.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.04 : 425.18 = 303.08 : x
  2. Step 2: Convert to fraction form
    306.04/425.18 = 303.08/x
  3. Step 3: Cross multiply
    306.04x = 425.18 × 303.08
  4. Step 4: Simplify right side
    306.04x = 128,863.55
  5. Step 5: Solve for x
    x = 128,863.55/306.04
  6. Step 6: Final answer
    x = 421.07

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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.