Home / 2,817.28-3,888.08-1,638.28

Finding the Fourth Proportional to 2,817.28, 3,888.08 and 1,638.28

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Solution

The fourth proportional to 2,817.28, 3,888.08 and 1,638.28 is: 2,260.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.28 : 3,888.08 = 1,638.28 : x
  2. Step 2: Convert to fraction form
    2,817.28/3,888.08 = 1,638.28/x
  3. Step 3: Cross multiply
    2,817.28x = 3,888.08 × 1,638.28
  4. Step 4: Simplify right side
    2,817.28x = 6,369,763.70
  5. Step 5: Solve for x
    x = 6,369,763.70/2,817.28
  6. Step 6: Final answer
    x = 2,260.96

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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.