Home / 1,638.36-2,455.74-1,225.08

Finding the Fourth Proportional to 1,638.36, 2,455.74 and 1,225.08

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Solution

The fourth proportional to 1,638.36, 2,455.74 and 1,225.08 is: 1,836.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.36 : 2,455.74 = 1,225.08 : x
  2. Step 2: Convert to fraction form
    1,638.36/2,455.74 = 1,225.08/x
  3. Step 3: Cross multiply
    1,638.36x = 2,455.74 × 1,225.08
  4. Step 4: Simplify right side
    1,638.36x = 3,008,477.96
  5. Step 5: Solve for x
    x = 3,008,477.96/1,638.36
  6. Step 6: Final answer
    x = 1,836.27

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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.