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Finding the Fourth Proportional to 1,145.39, 1,718.09 and 414.97

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Solution

The fourth proportional to 1,145.39, 1,718.09 and 414.97 is: 622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.39 : 1,718.09 = 414.97 : x
  2. Step 2: Convert to fraction form
    1,145.39/1,718.09 = 414.97/x
  3. Step 3: Cross multiply
    1,145.39x = 1,718.09 × 414.97
  4. Step 4: Simplify right side
    1,145.39x = 712,948.62
  5. Step 5: Solve for x
    x = 712,948.62/1,145.39
  6. Step 6: Final answer
    x = 622.45

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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.