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Finding the Fourth Proportional to 1,947.63, 2,919.40 and 959.08

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Solution

The fourth proportional to 1,947.63, 2,919.40 and 959.08 is: 1,437.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.63 : 2,919.40 = 959.08 : x
  2. Step 2: Convert to fraction form
    1,947.63/2,919.40 = 959.08/x
  3. Step 3: Cross multiply
    1,947.63x = 2,919.40 × 959.08
  4. Step 4: Simplify right side
    1,947.63x = 2,799,938.15
  5. Step 5: Solve for x
    x = 2,799,938.15/1,947.63
  6. Step 6: Final answer
    x = 1,437.61

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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.