Home / 4,290-6,429.56-1,821.92

Finding the Fourth Proportional to 4,290, 6,429.56 and 1,821.92

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Solution

The fourth proportional to 4,290, 6,429.56 and 1,821.92 is: 2,730.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,290 : 6,429.56 = 1,821.92 : x
  2. Step 2: Convert to fraction form
    4,290/6,429.56 = 1,821.92/x
  3. Step 3: Cross multiply
    4,290x = 6,429.56 × 1,821.92
  4. Step 4: Simplify right side
    4,290x = 11,714,143.96
  5. Step 5: Solve for x
    x = 11,714,143.96/4,290
  6. Step 6: Final answer
    x = 2,730.57

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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.