Home / 1,638.10-2,457.45-664.88

Finding the Fourth Proportional to 1,638.10, 2,457.45 and 664.88

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Solution

The fourth proportional to 1,638.10, 2,457.45 and 664.88 is: 997.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.10 : 2,457.45 = 664.88 : x
  2. Step 2: Convert to fraction form
    1,638.10/2,457.45 = 664.88/x
  3. Step 3: Cross multiply
    1,638.10x = 2,457.45 × 664.88
  4. Step 4: Simplify right side
    1,638.10x = 1,633,909.36
  5. Step 5: Solve for x
    x = 1,633,909.36/1,638.10
  6. Step 6: Final answer
    x = 997.44

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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.