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Finding the Fourth Proportional to 2,709.65, 4,064.51 and 860.83

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Solution

The fourth proportional to 2,709.65, 4,064.51 and 860.83 is: 1,291.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,709.65 : 4,064.51 = 860.83 : x
  2. Step 2: Convert to fraction form
    2,709.65/4,064.51 = 860.83/x
  3. Step 3: Cross multiply
    2,709.65x = 4,064.51 × 860.83
  4. Step 4: Simplify right side
    2,709.65x = 3,498,844.13
  5. Step 5: Solve for x
    x = 3,498,844.13/2,709.65
  6. Step 6: Final answer
    x = 1,291.25

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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.