Home / 2,116.25-2,920.38-1,277.65

Finding the Fourth Proportional to 2,116.25, 2,920.38 and 1,277.65

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Solution

The fourth proportional to 2,116.25, 2,920.38 and 1,277.65 is: 1,763.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.25 : 2,920.38 = 1,277.65 : x
  2. Step 2: Convert to fraction form
    2,116.25/2,920.38 = 1,277.65/x
  3. Step 3: Cross multiply
    2,116.25x = 2,920.38 × 1,277.65
  4. Step 4: Simplify right side
    2,116.25x = 3,731,223.51
  5. Step 5: Solve for x
    x = 3,731,223.51/2,116.25
  6. Step 6: Final answer
    x = 1,763.13

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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.