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Finding the Fourth Proportional to 306.36, 423.08 and 284.52

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Solution

The fourth proportional to 306.36, 423.08 and 284.52 is: 392.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.36 : 423.08 = 284.52 : x
  2. Step 2: Convert to fraction form
    306.36/423.08 = 284.52/x
  3. Step 3: Cross multiply
    306.36x = 423.08 × 284.52
  4. Step 4: Simplify right side
    306.36x = 120,374.72
  5. Step 5: Solve for x
    x = 120,374.72/306.36
  6. Step 6: Final answer
    x = 392.92

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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.