Home / 3,129.91-4,690.72-1,646.09

Finding the Fourth Proportional to 3,129.91, 4,690.72 and 1,646.09

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Solution

The fourth proportional to 3,129.91, 4,690.72 and 1,646.09 is: 2,466.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.91 : 4,690.72 = 1,646.09 : x
  2. Step 2: Convert to fraction form
    3,129.91/4,690.72 = 1,646.09/x
  3. Step 3: Cross multiply
    3,129.91x = 4,690.72 × 1,646.09
  4. Step 4: Simplify right side
    3,129.91x = 7,721,354.90
  5. Step 5: Solve for x
    x = 7,721,354.90/3,129.91
  6. Step 6: Final answer
    x = 2,466.96

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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.