Home / 1,946.81-2,686.75-1,107.79

Finding the Fourth Proportional to 1,946.81, 2,686.75 and 1,107.79

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Solution

The fourth proportional to 1,946.81, 2,686.75 and 1,107.79 is: 1,528.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.81 : 2,686.75 = 1,107.79 : x
  2. Step 2: Convert to fraction form
    1,946.81/2,686.75 = 1,107.79/x
  3. Step 3: Cross multiply
    1,946.81x = 2,686.75 × 1,107.79
  4. Step 4: Simplify right side
    1,946.81x = 2,976,345.30
  5. Step 5: Solve for x
    x = 2,976,345.30/1,946.81
  6. Step 6: Final answer
    x = 1,528.83

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1.5x scale

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.