Home / 2,687.04-3,707.28-1,638.72

Finding the Fourth Proportional to 2,687.04, 3,707.28 and 1,638.72

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Solution

The fourth proportional to 2,687.04, 3,707.28 and 1,638.72 is: 2,260.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.04 : 3,707.28 = 1,638.72 : x
  2. Step 2: Convert to fraction form
    2,687.04/3,707.28 = 1,638.72/x
  3. Step 3: Cross multiply
    2,687.04x = 3,707.28 × 1,638.72
  4. Step 4: Simplify right side
    2,687.04x = 6,075,193.88
  5. Step 5: Solve for x
    x = 6,075,193.88/2,687.04
  6. Step 6: Final answer
    x = 2,260.92

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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.