Home / 4,287.64-6,426.78-1,687.72

Finding the Fourth Proportional to 4,287.64, 6,426.78 and 1,687.72

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Solution

The fourth proportional to 4,287.64, 6,426.78 and 1,687.72 is: 2,529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,287.64 : 6,426.78 = 1,687.72 : x
  2. Step 2: Convert to fraction form
    4,287.64/6,426.78 = 1,687.72/x
  3. Step 3: Cross multiply
    4,287.64x = 6,426.78 × 1,687.72
  4. Step 4: Simplify right side
    4,287.64x = 10,846,605.14
  5. Step 5: Solve for x
    x = 10,846,605.14/4,287.64
  6. Step 6: Final answer
    x = 2,529.74

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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.