Home / 1,720.74-2,374.79-974.73

Finding the Fourth Proportional to 1,720.74, 2,374.79 and 974.73

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Solution

The fourth proportional to 1,720.74, 2,374.79 and 974.73 is: 1,345.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.74 : 2,374.79 = 974.73 : x
  2. Step 2: Convert to fraction form
    1,720.74/2,374.79 = 974.73/x
  3. Step 3: Cross multiply
    1,720.74x = 2,374.79 × 974.73
  4. Step 4: Simplify right side
    1,720.74x = 2,314,791.31
  5. Step 5: Solve for x
    x = 2,314,791.31/1,720.74
  6. Step 6: Final answer
    x = 1,345.23

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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.