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Finding the Fourth Proportional to 1,145.34, 1,716.99 and 414.77

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Solution

The fourth proportional to 1,145.34, 1,716.99 and 414.77 is: 621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.34 : 1,716.99 = 414.77 : x
  2. Step 2: Convert to fraction form
    1,145.34/1,716.99 = 414.77/x
  3. Step 3: Cross multiply
    1,145.34x = 1,716.99 × 414.77
  4. Step 4: Simplify right side
    1,145.34x = 712,147.36
  5. Step 5: Solve for x
    x = 712,147.36/1,145.34
  6. Step 6: Final answer
    x = 621.78

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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.