Home / 1,947.03-2,685.70-1,387.68

Finding the Fourth Proportional to 1,947.03, 2,685.70 and 1,387.68

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Solution

The fourth proportional to 1,947.03, 2,685.70 and 1,387.68 is: 1,914.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.03 : 2,685.70 = 1,387.68 : x
  2. Step 2: Convert to fraction form
    1,947.03/2,685.70 = 1,387.68/x
  3. Step 3: Cross multiply
    1,947.03x = 2,685.70 × 1,387.68
  4. Step 4: Simplify right side
    1,947.03x = 3,726,871.81
  5. Step 5: Solve for x
    x = 3,726,871.81/1,947.03
  6. Step 6: Final answer
    x = 1,914.13

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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.