Home / 2,569.11-3,545.38-1,390.19

Finding the Fourth Proportional to 2,569.11, 3,545.38 and 1,390.19

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Solution

The fourth proportional to 2,569.11, 3,545.38 and 1,390.19 is: 1,918.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.11 : 3,545.38 = 1,390.19 : x
  2. Step 2: Convert to fraction form
    2,569.11/3,545.38 = 1,390.19/x
  3. Step 3: Cross multiply
    2,569.11x = 3,545.38 × 1,390.19
  4. Step 4: Simplify right side
    2,569.11x = 4,928,751.82
  5. Step 5: Solve for x
    x = 4,928,751.82/2,569.11
  6. Step 6: Final answer
    x = 1,918.47

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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.