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Finding the Fourth Proportional to 306.94, 423.62 and 176

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Solution

The fourth proportional to 306.94, 423.62 and 176 is: 242.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.94 : 423.62 = 176 : x
  2. Step 2: Convert to fraction form
    306.94/423.62 = 176/x
  3. Step 3: Cross multiply
    306.94x = 423.62 × 176
  4. Step 4: Simplify right side
    306.94x = 74,557.12
  5. Step 5: Solve for x
    x = 74,557.12/306.94
  6. Step 6: Final answer
    x = 242.90

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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.