Home / 1,261.79-1,889.75-1,217.99

Finding the Fourth Proportional to 1,261.79, 1,889.75 and 1,217.99

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Solution

The fourth proportional to 1,261.79, 1,889.75 and 1,217.99 is: 1,824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.79 : 1,889.75 = 1,217.99 : x
  2. Step 2: Convert to fraction form
    1,261.79/1,889.75 = 1,217.99/x
  3. Step 3: Cross multiply
    1,261.79x = 1,889.75 × 1,217.99
  4. Step 4: Simplify right side
    1,261.79x = 2,301,690.51
  5. Step 5: Solve for x
    x = 2,301,690.51/1,261.79
  6. Step 6: Final answer
    x = 1,824.15

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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.