Home / 2,569.36-3,545.70-1,390.42

Finding the Fourth Proportional to 2,569.36, 3,545.70 and 1,390.42

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Solution

The fourth proportional to 2,569.36, 3,545.70 and 1,390.42 is: 1,918.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.36 : 3,545.70 = 1,390.42 : x
  2. Step 2: Convert to fraction form
    2,569.36/3,545.70 = 1,390.42/x
  3. Step 3: Cross multiply
    2,569.36x = 3,545.70 × 1,390.42
  4. Step 4: Simplify right side
    2,569.36x = 4,930,012.19
  5. Step 5: Solve for x
    x = 4,930,012.19/2,569.36
  6. Step 6: Final answer
    x = 1,918.77

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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.