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Finding the Fourth Proportional to 2,709.40, 4,064.24 and 860.38

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Solution

The fourth proportional to 2,709.40, 4,064.24 and 860.38 is: 1,290.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,709.40 : 4,064.24 = 860.38 : x
  2. Step 2: Convert to fraction form
    2,709.40/4,064.24 = 860.38/x
  3. Step 3: Cross multiply
    2,709.40x = 4,064.24 × 860.38
  4. Step 4: Simplify right side
    2,709.40x = 3,496,790.81
  5. Step 5: Solve for x
    x = 3,496,790.81/2,709.40
  6. Step 6: Final answer
    x = 1,290.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.