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Finding the Fourth Proportional to 306.99, 460.28 and 279.65

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Solution

The fourth proportional to 306.99, 460.28 and 279.65 is: 419.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.99 : 460.28 = 279.65 : x
  2. Step 2: Convert to fraction form
    306.99/460.28 = 279.65/x
  3. Step 3: Cross multiply
    306.99x = 460.28 × 279.65
  4. Step 4: Simplify right side
    306.99x = 128,719.15
  5. Step 5: Solve for x
    x = 128,719.15/306.99
  6. Step 6: Final answer
    x = 419.29

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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.