Home / 1,947.30-2,919.76-777.48

Finding the Fourth Proportional to 1,947.30, 2,919.76 and 777.48

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Solution

The fourth proportional to 1,947.30, 2,919.76 and 777.48 is: 1,165.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.30 : 2,919.76 = 777.48 : x
  2. Step 2: Convert to fraction form
    1,947.30/2,919.76 = 777.48/x
  3. Step 3: Cross multiply
    1,947.30x = 2,919.76 × 777.48
  4. Step 4: Simplify right side
    1,947.30x = 2,270,055.00
  5. Step 5: Solve for x
    x = 2,270,055.00/1,947.30
  6. Step 6: Final answer
    x = 1,165.74

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1.5x scale

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.