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Finding the Fourth Proportional to 306.81, 460.49 and 266.31

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Solution

The fourth proportional to 306.81, 460.49 and 266.31 is: 399.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.81 : 460.49 = 266.31 : x
  2. Step 2: Convert to fraction form
    306.81/460.49 = 266.31/x
  3. Step 3: Cross multiply
    306.81x = 460.49 × 266.31
  4. Step 4: Simplify right side
    306.81x = 122,631.76
  5. Step 5: Solve for x
    x = 122,631.76/306.81
  6. Step 6: Final answer
    x = 399.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.