Home / 1,720.91-2,374.09-1,021.88

Finding the Fourth Proportional to 1,720.91, 2,374.09 and 1,021.88

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Solution

The fourth proportional to 1,720.91, 2,374.09 and 1,021.88 is: 1,409.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.91 : 2,374.09 = 1,021.88 : x
  2. Step 2: Convert to fraction form
    1,720.91/2,374.09 = 1,021.88/x
  3. Step 3: Cross multiply
    1,720.91x = 2,374.09 × 1,021.88
  4. Step 4: Simplify right side
    1,720.91x = 2,426,020.66
  5. Step 5: Solve for x
    x = 2,426,020.66/1,720.91
  6. Step 6: Final answer
    x = 1,409.74

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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.