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Finding the Fourth Proportional to 1,735.72, 2,395.36 and 989.80

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Solution

The fourth proportional to 1,735.72, 2,395.36 and 989.80 is: 1,365.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,735.72 : 2,395.36 = 989.80 : x
  2. Step 2: Convert to fraction form
    1,735.72/2,395.36 = 989.80/x
  3. Step 3: Cross multiply
    1,735.72x = 2,395.36 × 989.80
  4. Step 4: Simplify right side
    1,735.72x = 2,370,927.33
  5. Step 5: Solve for x
    x = 2,370,927.33/1,735.72
  6. Step 6: Final answer
    x = 1,365.96

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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.