Home / 2,817.03-3,887.98-1,638.78

Finding the Fourth Proportional to 2,817.03, 3,887.98 and 1,638.78

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Solution

The fourth proportional to 2,817.03, 3,887.98 and 1,638.78 is: 2,261.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.03 : 3,887.98 = 1,638.78 : x
  2. Step 2: Convert to fraction form
    2,817.03/3,887.98 = 1,638.78/x
  3. Step 3: Cross multiply
    2,817.03x = 3,887.98 × 1,638.78
  4. Step 4: Simplify right side
    2,817.03x = 6,371,543.86
  5. Step 5: Solve for x
    x = 6,371,543.86/2,817.03
  6. Step 6: Final answer
    x = 2,261.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.