Home / 2,569.40-3,545.77-1,390.47

Finding the Fourth Proportional to 2,569.40, 3,545.77 and 1,390.47

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Solution

The fourth proportional to 2,569.40, 3,545.77 and 1,390.47 is: 1,918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.40 : 3,545.77 = 1,390.47 : x
  2. Step 2: Convert to fraction form
    2,569.40/3,545.77 = 1,390.47/x
  3. Step 3: Cross multiply
    2,569.40x = 3,545.77 × 1,390.47
  4. Step 4: Simplify right side
    2,569.40x = 4,930,269.08
  5. Step 5: Solve for x
    x = 4,930,269.08/2,569.40
  6. Step 6: Final answer
    x = 1,918.84

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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.