Home / 2,138.50-3,207.71-1,266.99

Finding the Fourth Proportional to 2,138.50, 3,207.71 and 1,266.99

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Solution

The fourth proportional to 2,138.50, 3,207.71 and 1,266.99 is: 1,900.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.50 : 3,207.71 = 1,266.99 : x
  2. Step 2: Convert to fraction form
    2,138.50/3,207.71 = 1,266.99/x
  3. Step 3: Cross multiply
    2,138.50x = 3,207.71 × 1,266.99
  4. Step 4: Simplify right side
    2,138.50x = 4,064,127.63
  5. Step 5: Solve for x
    x = 4,064,127.63/2,138.50
  6. Step 6: Final answer
    x = 1,900.46

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1.5x scale

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.