Home / 1,608.24-2,219.40-909.76

Finding the Fourth Proportional to 1,608.24, 2,219.40 and 909.76

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Solution

The fourth proportional to 1,608.24, 2,219.40 and 909.76 is: 1,255.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.24 : 2,219.40 = 909.76 : x
  2. Step 2: Convert to fraction form
    1,608.24/2,219.40 = 909.76/x
  3. Step 3: Cross multiply
    1,608.24x = 2,219.40 × 909.76
  4. Step 4: Simplify right side
    1,608.24x = 2,019,121.34
  5. Step 5: Solve for x
    x = 2,019,121.34/1,608.24
  6. Step 6: Final answer
    x = 1,255.49

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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.