Home / 1,609.89-2,221.74-1,216.23

Finding the Fourth Proportional to 1,609.89, 2,221.74 and 1,216.23

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Solution

The fourth proportional to 1,609.89, 2,221.74 and 1,216.23 is: 1,678.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.89 : 2,221.74 = 1,216.23 : x
  2. Step 2: Convert to fraction form
    1,609.89/2,221.74 = 1,216.23/x
  3. Step 3: Cross multiply
    1,609.89x = 2,221.74 × 1,216.23
  4. Step 4: Simplify right side
    1,609.89x = 2,702,146.84
  5. Step 5: Solve for x
    x = 2,702,146.84/1,609.89
  6. Step 6: Final answer
    x = 1,678.47

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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.