Home / 2,817.40-3,888.98-1,638.84

Finding the Fourth Proportional to 2,817.40, 3,888.98 and 1,638.84

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Solution

The fourth proportional to 2,817.40, 3,888.98 and 1,638.84 is: 2,262.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.40 : 3,888.98 = 1,638.84 : x
  2. Step 2: Convert to fraction form
    2,817.40/3,888.98 = 1,638.84/x
  3. Step 3: Cross multiply
    2,817.40x = 3,888.98 × 1,638.84
  4. Step 4: Simplify right side
    2,817.40x = 6,373,415.98
  5. Step 5: Solve for x
    x = 6,373,415.98/2,817.40
  6. Step 6: Final answer
    x = 2,262.16

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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.