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Finding the Fourth Proportional to 1,716.12, 2,572.56 and 945

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Solution

The fourth proportional to 1,716.12, 2,572.56 and 945 is: 1,416.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,716.12 : 2,572.56 = 945 : x
  2. Step 2: Convert to fraction form
    1,716.12/2,572.56 = 945/x
  3. Step 3: Cross multiply
    1,716.12x = 2,572.56 × 945
  4. Step 4: Simplify right side
    1,716.12x = 2,431,069.20
  5. Step 5: Solve for x
    x = 2,431,069.20/1,716.12
  6. Step 6: Final answer
    x = 1,416.61

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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.