Home / 1,947.40-2,687.65-1,108.31

Finding the Fourth Proportional to 1,947.40, 2,687.65 and 1,108.31

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Solution

The fourth proportional to 1,947.40, 2,687.65 and 1,108.31 is: 1,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.40 : 2,687.65 = 1,108.31 : x
  2. Step 2: Convert to fraction form
    1,947.40/2,687.65 = 1,108.31/x
  3. Step 3: Cross multiply
    1,947.40x = 2,687.65 × 1,108.31
  4. Step 4: Simplify right side
    1,947.40x = 2,978,750.76
  5. Step 5: Solve for x
    x = 2,978,750.76/1,947.40
  6. Step 6: Final answer
    x = 1,529.60

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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.