Home / 2,568.93-3,545.12-1,390

Finding the Fourth Proportional to 2,568.93, 3,545.12 and 1,390

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Solution

The fourth proportional to 2,568.93, 3,545.12 and 1,390 is: 1,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,568.93 : 3,545.12 = 1,390 : x
  2. Step 2: Convert to fraction form
    2,568.93/3,545.12 = 1,390/x
  3. Step 3: Cross multiply
    2,568.93x = 3,545.12 × 1,390
  4. Step 4: Simplify right side
    2,568.93x = 4,927,716.80
  5. Step 5: Solve for x
    x = 4,927,716.80/2,568.93
  6. Step 6: Final answer
    x = 1,918.20

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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.