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Finding the Fourth Proportional to 1,147.24, 1,720.14 and 416.14

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Solution

The fourth proportional to 1,147.24, 1,720.14 and 416.14 is: 623.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.24 : 1,720.14 = 416.14 : x
  2. Step 2: Convert to fraction form
    1,147.24/1,720.14 = 416.14/x
  3. Step 3: Cross multiply
    1,147.24x = 1,720.14 × 416.14
  4. Step 4: Simplify right side
    1,147.24x = 715,819.06
  5. Step 5: Solve for x
    x = 715,819.06/1,147.24
  6. Step 6: Final answer
    x = 623.95

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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.