Home / 2,431.90-3,642.45-1,276.30

Finding the Fourth Proportional to 2,431.90, 3,642.45 and 1,276.30

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Solution

The fourth proportional to 2,431.90, 3,642.45 and 1,276.30 is: 1,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.90 : 3,642.45 = 1,276.30 : x
  2. Step 2: Convert to fraction form
    2,431.90/3,642.45 = 1,276.30/x
  3. Step 3: Cross multiply
    2,431.90x = 3,642.45 × 1,276.30
  4. Step 4: Simplify right side
    2,431.90x = 4,648,858.94
  5. Step 5: Solve for x
    x = 4,648,858.94/2,431.90
  6. Step 6: Final answer
    x = 1,911.62

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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.