Home / 1,638.36-2,447.28-1,225.26

Finding the Fourth Proportional to 1,638.36, 2,447.28 and 1,225.26

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Solution

The fourth proportional to 1,638.36, 2,447.28 and 1,225.26 is: 1,830.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.36 : 2,447.28 = 1,225.26 : x
  2. Step 2: Convert to fraction form
    1,638.36/2,447.28 = 1,225.26/x
  3. Step 3: Cross multiply
    1,638.36x = 2,447.28 × 1,225.26
  4. Step 4: Simplify right side
    1,638.36x = 2,998,554.29
  5. Step 5: Solve for x
    x = 2,998,554.29/1,638.36
  6. Step 6: Final answer
    x = 1,830.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.