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Finding the Fourth Proportional to 2,918.66, 4,377.26 and 838.17

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Solution

The fourth proportional to 2,918.66, 4,377.26 and 838.17 is: 1,257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.66 : 4,377.26 = 838.17 : x
  2. Step 2: Convert to fraction form
    2,918.66/4,377.26 = 838.17/x
  3. Step 3: Cross multiply
    2,918.66x = 4,377.26 × 838.17
  4. Step 4: Simplify right side
    2,918.66x = 3,668,883.82
  5. Step 5: Solve for x
    x = 3,668,883.82/2,918.66
  6. Step 6: Final answer
    x = 1,257.05

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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.