Home / 3,685.68-5,529.30-1,220.70

Finding the Fourth Proportional to 3,685.68, 5,529.30 and 1,220.70

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Solution

The fourth proportional to 3,685.68, 5,529.30 and 1,220.70 is: 1,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,685.68 : 5,529.30 = 1,220.70 : x
  2. Step 2: Convert to fraction form
    3,685.68/5,529.30 = 1,220.70/x
  3. Step 3: Cross multiply
    3,685.68x = 5,529.30 × 1,220.70
  4. Step 4: Simplify right side
    3,685.68x = 6,749,616.51
  5. Step 5: Solve for x
    x = 6,749,616.51/3,685.68
  6. Step 6: Final answer
    x = 1,831.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.