Home / 2,817.14-3,888.28-1,638.90

Finding the Fourth Proportional to 2,817.14, 3,888.28 and 1,638.90

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Solution

The fourth proportional to 2,817.14, 3,888.28 and 1,638.90 is: 2,262.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.14 : 3,888.28 = 1,638.90 : x
  2. Step 2: Convert to fraction form
    2,817.14/3,888.28 = 1,638.90/x
  3. Step 3: Cross multiply
    2,817.14x = 3,888.28 × 1,638.90
  4. Step 4: Simplify right side
    2,817.14x = 6,372,502.09
  5. Step 5: Solve for x
    x = 6,372,502.09/2,817.14
  6. Step 6: Final answer
    x = 2,262.05

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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.