Home / 3,618.78-5,428.74-1,538.80

Finding the Fourth Proportional to 3,618.78, 5,428.74 and 1,538.80

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Solution

The fourth proportional to 3,618.78, 5,428.74 and 1,538.80 is: 2,308.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.78 : 5,428.74 = 1,538.80 : x
  2. Step 2: Convert to fraction form
    3,618.78/5,428.74 = 1,538.80/x
  3. Step 3: Cross multiply
    3,618.78x = 5,428.74 × 1,538.80
  4. Step 4: Simplify right side
    3,618.78x = 8,353,745.11
  5. Step 5: Solve for x
    x = 8,353,745.11/3,618.78
  6. Step 6: Final answer
    x = 2,308.45

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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.