Home / 1,638.84-2,457.30-1,125.24

Finding the Fourth Proportional to 1,638.84, 2,457.30 and 1,125.24

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Solution

The fourth proportional to 1,638.84, 2,457.30 and 1,125.24 is: 1,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.84 : 2,457.30 = 1,125.24 : x
  2. Step 2: Convert to fraction form
    1,638.84/2,457.30 = 1,125.24/x
  3. Step 3: Cross multiply
    1,638.84x = 2,457.30 × 1,125.24
  4. Step 4: Simplify right side
    1,638.84x = 2,765,052.25
  5. Step 5: Solve for x
    x = 2,765,052.25/1,638.84
  6. Step 6: Final answer
    x = 1,687.20

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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.