Home / 1,609.27-2,220.22-979.60

Finding the Fourth Proportional to 1,609.27, 2,220.22 and 979.60

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Solution

The fourth proportional to 1,609.27, 2,220.22 and 979.60 is: 1,351.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.27 : 2,220.22 = 979.60 : x
  2. Step 2: Convert to fraction form
    1,609.27/2,220.22 = 979.60/x
  3. Step 3: Cross multiply
    1,609.27x = 2,220.22 × 979.60
  4. Step 4: Simplify right side
    1,609.27x = 2,174,927.51
  5. Step 5: Solve for x
    x = 2,174,927.51/1,609.27
  6. Step 6: Final answer
    x = 1,351.50

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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.