Home / 1,638.12-2,458.08-1,633.20

Finding the Fourth Proportional to 1,638.12, 2,458.08 and 1,633.20

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Solution

The fourth proportional to 1,638.12, 2,458.08 and 1,633.20 is: 2,450.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.12 : 2,458.08 = 1,633.20 : x
  2. Step 2: Convert to fraction form
    1,638.12/2,458.08 = 1,633.20/x
  3. Step 3: Cross multiply
    1,638.12x = 2,458.08 × 1,633.20
  4. Step 4: Simplify right side
    1,638.12x = 4,014,536.26
  5. Step 5: Solve for x
    x = 4,014,536.26/1,638.12
  6. Step 6: Final answer
    x = 2,450.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.