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Finding the Fourth Proportional to 1,917.63, 2,647.19 and 1,491.30

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Solution

The fourth proportional to 1,917.63, 2,647.19 and 1,491.30 is: 2,058.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.63 : 2,647.19 = 1,491.30 : x
  2. Step 2: Convert to fraction form
    1,917.63/2,647.19 = 1,491.30/x
  3. Step 3: Cross multiply
    1,917.63x = 2,647.19 × 1,491.30
  4. Step 4: Simplify right side
    1,917.63x = 3,947,738.74
  5. Step 5: Solve for x
    x = 3,947,738.74/1,917.63
  6. Step 6: Final answer
    x = 2,058.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.