Home / 1,719.78-2,374.30-1,247.22

Finding the Fourth Proportional to 1,719.78, 2,374.30 and 1,247.22

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Solution

The fourth proportional to 1,719.78, 2,374.30 and 1,247.22 is: 1,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.78 : 2,374.30 = 1,247.22 : x
  2. Step 2: Convert to fraction form
    1,719.78/2,374.30 = 1,247.22/x
  3. Step 3: Cross multiply
    1,719.78x = 2,374.30 × 1,247.22
  4. Step 4: Simplify right side
    1,719.78x = 2,961,274.45
  5. Step 5: Solve for x
    x = 2,961,274.45/1,719.78
  6. Step 6: Final answer
    x = 1,721.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.