Home / 1,947.39-2,921.19-777.57

Finding the Fourth Proportional to 1,947.39, 2,921.19 and 777.57

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Solution

The fourth proportional to 1,947.39, 2,921.19 and 777.57 is: 1,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.39 : 2,921.19 = 777.57 : x
  2. Step 2: Convert to fraction form
    1,947.39/2,921.19 = 777.57/x
  3. Step 3: Cross multiply
    1,947.39x = 2,921.19 × 777.57
  4. Step 4: Simplify right side
    1,947.39x = 2,271,429.71
  5. Step 5: Solve for x
    x = 2,271,429.71/1,947.39
  6. Step 6: Final answer
    x = 1,166.40

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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.