Home / 1,638.35-2,457.70-945.80

Finding the Fourth Proportional to 1,638.35, 2,457.70 and 945.80

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Solution

The fourth proportional to 1,638.35, 2,457.70 and 945.80 is: 1,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.35 : 2,457.70 = 945.80 : x
  2. Step 2: Convert to fraction form
    1,638.35/2,457.70 = 945.80/x
  3. Step 3: Cross multiply
    1,638.35x = 2,457.70 × 945.80
  4. Step 4: Simplify right side
    1,638.35x = 2,324,492.66
  5. Step 5: Solve for x
    x = 2,324,492.66/1,638.35
  6. Step 6: Final answer
    x = 1,418.80

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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.