Home / 2,565.14-3,539.90-1,386.21

Finding the Fourth Proportional to 2,565.14, 3,539.90 and 1,386.21

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Solution

The fourth proportional to 2,565.14, 3,539.90 and 1,386.21 is: 1,912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,565.14 : 3,539.90 = 1,386.21 : x
  2. Step 2: Convert to fraction form
    2,565.14/3,539.90 = 1,386.21/x
  3. Step 3: Cross multiply
    2,565.14x = 3,539.90 × 1,386.21
  4. Step 4: Simplify right side
    2,565.14x = 4,907,037.85
  5. Step 5: Solve for x
    x = 4,907,037.85/2,565.14
  6. Step 6: Final answer
    x = 1,912.97

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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.