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Finding the Fourth Proportional to 2,918.96, 4,375.39 and 1,275.07

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Solution

The fourth proportional to 2,918.96, 4,375.39 and 1,275.07 is: 1,911.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.96 : 4,375.39 = 1,275.07 : x
  2. Step 2: Convert to fraction form
    2,918.96/4,375.39 = 1,275.07/x
  3. Step 3: Cross multiply
    2,918.96x = 4,375.39 × 1,275.07
  4. Step 4: Simplify right side
    2,918.96x = 5,578,928.53
  5. Step 5: Solve for x
    x = 5,578,928.53/2,918.96
  6. Step 6: Final answer
    x = 1,911.27

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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.