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Finding the Fourth Proportional to 3,638.84, 5,457.74 and 1,789.46

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Solution

The fourth proportional to 3,638.84, 5,457.74 and 1,789.46 is: 2,683.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.84 : 5,457.74 = 1,789.46 : x
  2. Step 2: Convert to fraction form
    3,638.84/5,457.74 = 1,789.46/x
  3. Step 3: Cross multiply
    3,638.84x = 5,457.74 × 1,789.46
  4. Step 4: Simplify right side
    3,638.84x = 9,766,412.12
  5. Step 5: Solve for x
    x = 9,766,412.12/3,638.84
  6. Step 6: Final answer
    x = 2,683.93

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1.5x scale

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.