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Finding the Fourth Proportional to 1,735.34, 2,394.49 and 989.30

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Solution

The fourth proportional to 1,735.34, 2,394.49 and 989.30 is: 1,365.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,735.34 : 2,394.49 = 989.30 : x
  2. Step 2: Convert to fraction form
    1,735.34/2,394.49 = 989.30/x
  3. Step 3: Cross multiply
    1,735.34x = 2,394.49 × 989.30
  4. Step 4: Simplify right side
    1,735.34x = 2,368,868.96
  5. Step 5: Solve for x
    x = 2,368,868.96/1,735.34
  6. Step 6: Final answer
    x = 1,365.07

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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.