Home / 3,628.71-5,445.48-1,320.21

Finding the Fourth Proportional to 3,628.71, 5,445.48 and 1,320.21

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Solution

The fourth proportional to 3,628.71, 5,445.48 and 1,320.21 is: 1,981.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,628.71 : 5,445.48 = 1,320.21 : x
  2. Step 2: Convert to fraction form
    3,628.71/5,445.48 = 1,320.21/x
  3. Step 3: Cross multiply
    3,628.71x = 5,445.48 × 1,320.21
  4. Step 4: Simplify right side
    3,628.71x = 7,189,149.92
  5. Step 5: Solve for x
    x = 7,189,149.92/3,628.71
  6. Step 6: Final answer
    x = 1,981.19

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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.