Home / 1,609.83-2,219.49-1,388.34

Finding the Fourth Proportional to 1,609.83, 2,219.49 and 1,388.34

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Solution

The fourth proportional to 1,609.83, 2,219.49 and 1,388.34 is: 1,914.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.83 : 2,219.49 = 1,388.34 : x
  2. Step 2: Convert to fraction form
    1,609.83/2,219.49 = 1,388.34/x
  3. Step 3: Cross multiply
    1,609.83x = 2,219.49 × 1,388.34
  4. Step 4: Simplify right side
    1,609.83x = 3,081,406.75
  5. Step 5: Solve for x
    x = 3,081,406.75/1,609.83
  6. Step 6: Final answer
    x = 1,914.12

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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.