Home / 3,629.78-5,445-1,289.55

Finding the Fourth Proportional to 3,629.78, 5,445 and 1,289.55

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Solution

The fourth proportional to 3,629.78, 5,445 and 1,289.55 is: 1,934.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,629.78 : 5,445 = 1,289.55 : x
  2. Step 2: Convert to fraction form
    3,629.78/5,445 = 1,289.55/x
  3. Step 3: Cross multiply
    3,629.78x = 5,445 × 1,289.55
  4. Step 4: Simplify right side
    3,629.78x = 7,021,599.75
  5. Step 5: Solve for x
    x = 7,021,599.75/3,629.78
  6. Step 6: Final answer
    x = 1,934.44

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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.