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Finding the Fourth Proportional to 5,477.80, 8,216.70 and 4,978.60

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Solution

The fourth proportional to 5,477.80, 8,216.70 and 4,978.60 is: 7,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,477.80 : 8,216.70 = 4,978.60 : x
  2. Step 2: Convert to fraction form
    5,477.80/8,216.70 = 4,978.60/x
  3. Step 3: Cross multiply
    5,477.80x = 8,216.70 × 4,978.60
  4. Step 4: Simplify right side
    5,477.80x = 40,907,662.62
  5. Step 5: Solve for x
    x = 40,907,662.62/5,477.80
  6. Step 6: Final answer
    x = 7,467.90

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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.