Home / 3,678.90-5,518.28-1,487.60

Finding the Fourth Proportional to 3,678.90, 5,518.28 and 1,487.60

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Solution

The fourth proportional to 3,678.90, 5,518.28 and 1,487.60 is: 2,231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.90 : 5,518.28 = 1,487.60 : x
  2. Step 2: Convert to fraction form
    3,678.90/5,518.28 = 1,487.60/x
  3. Step 3: Cross multiply
    3,678.90x = 5,518.28 × 1,487.60
  4. Step 4: Simplify right side
    3,678.90x = 8,208,993.33
  5. Step 5: Solve for x
    x = 8,208,993.33/3,678.90
  6. Step 6: Final answer
    x = 2,231.37

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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.