Home / 1,609.48-2,221.50-911.08

Finding the Fourth Proportional to 1,609.48, 2,221.50 and 911.08

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Solution

The fourth proportional to 1,609.48, 2,221.50 and 911.08 is: 1,257.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.48 : 2,221.50 = 911.08 : x
  2. Step 2: Convert to fraction form
    1,609.48/2,221.50 = 911.08/x
  3. Step 3: Cross multiply
    1,609.48x = 2,221.50 × 911.08
  4. Step 4: Simplify right side
    1,609.48x = 2,023,964.22
  5. Step 5: Solve for x
    x = 2,023,964.22/1,609.48
  6. Step 6: Final answer
    x = 1,257.53

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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.