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Finding the Fourth Proportional to 1,720.97, 2,374.94 and 935.02

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Solution

The fourth proportional to 1,720.97, 2,374.94 and 935.02 is: 1,290.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.97 : 2,374.94 = 935.02 : x
  2. Step 2: Convert to fraction form
    1,720.97/2,374.94 = 935.02/x
  3. Step 3: Cross multiply
    1,720.97x = 2,374.94 × 935.02
  4. Step 4: Simplify right side
    1,720.97x = 2,220,621.71
  5. Step 5: Solve for x
    x = 2,220,621.71/1,720.97
  6. Step 6: Final answer
    x = 1,290.33

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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.