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Finding the Fourth Proportional to 2,709.10, 4,064.15 and 860.68

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Solution

The fourth proportional to 2,709.10, 4,064.15 and 860.68 is: 1,291.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,709.10 : 4,064.15 = 860.68 : x
  2. Step 2: Convert to fraction form
    2,709.10/4,064.15 = 860.68/x
  3. Step 3: Cross multiply
    2,709.10x = 4,064.15 × 860.68
  4. Step 4: Simplify right side
    2,709.10x = 3,497,928.32
  5. Step 5: Solve for x
    x = 3,497,928.32/2,709.10
  6. Step 6: Final answer
    x = 1,291.18

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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.