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Finding the Fourth Proportional to 417.24, 626.13 and 279.99

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Solution

The fourth proportional to 417.24, 626.13 and 279.99 is: 420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.24 : 626.13 = 279.99 : x
  2. Step 2: Convert to fraction form
    417.24/626.13 = 279.99/x
  3. Step 3: Cross multiply
    417.24x = 626.13 × 279.99
  4. Step 4: Simplify right side
    417.24x = 175,310.14
  5. Step 5: Solve for x
    x = 175,310.14/417.24
  6. Step 6: Final answer
    x = 420.17

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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.