Home / 4,287.20-6,429.72-1,690.16

Finding the Fourth Proportional to 4,287.20, 6,429.72 and 1,690.16

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Solution

The fourth proportional to 4,287.20, 6,429.72 and 1,690.16 is: 2,534.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,287.20 : 6,429.72 = 1,690.16 : x
  2. Step 2: Convert to fraction form
    4,287.20/6,429.72 = 1,690.16/x
  3. Step 3: Cross multiply
    4,287.20x = 6,429.72 × 1,690.16
  4. Step 4: Simplify right side
    4,287.20x = 10,867,255.56
  5. Step 5: Solve for x
    x = 10,867,255.56/4,287.20
  6. Step 6: Final answer
    x = 2,534.81

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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.