Home / 1,638.45-2,454.03-1,270.35

Finding the Fourth Proportional to 1,638.45, 2,454.03 and 1,270.35

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Solution

The fourth proportional to 1,638.45, 2,454.03 and 1,270.35 is: 1,902.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.45 : 2,454.03 = 1,270.35 : x
  2. Step 2: Convert to fraction form
    1,638.45/2,454.03 = 1,270.35/x
  3. Step 3: Cross multiply
    1,638.45x = 2,454.03 × 1,270.35
  4. Step 4: Simplify right side
    1,638.45x = 3,117,477.01
  5. Step 5: Solve for x
    x = 3,117,477.01/1,638.45
  6. Step 6: Final answer
    x = 1,902.70

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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.