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Finding the Fourth Proportional to 1,145.68, 1,717.20 and 452.12

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Solution

The fourth proportional to 1,145.68, 1,717.20 and 452.12 is: 677.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.68 : 1,717.20 = 452.12 : x
  2. Step 2: Convert to fraction form
    1,145.68/1,717.20 = 452.12/x
  3. Step 3: Cross multiply
    1,145.68x = 1,717.20 × 452.12
  4. Step 4: Simplify right side
    1,145.68x = 776,371.88
  5. Step 5: Solve for x
    x = 776,371.88/1,145.68
  6. Step 6: Final answer
    x = 677.65

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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.