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Finding the Fourth Proportional to 1,736.79, 2,396.74 and 990.79

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Solution

The fourth proportional to 1,736.79, 2,396.74 and 990.79 is: 1,367.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,736.79 : 2,396.74 = 990.79 : x
  2. Step 2: Convert to fraction form
    1,736.79/2,396.74 = 990.79/x
  3. Step 3: Cross multiply
    1,736.79x = 2,396.74 × 990.79
  4. Step 4: Simplify right side
    1,736.79x = 2,374,666.02
  5. Step 5: Solve for x
    x = 2,374,666.02/1,736.79
  6. Step 6: Final answer
    x = 1,367.28

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1.5x scale

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.