Home / 4,879.20-7,318.80-4,814.40

Finding the Fourth Proportional to 4,879.20, 7,318.80 and 4,814.40

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Solution

The fourth proportional to 4,879.20, 7,318.80 and 4,814.40 is: 7,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.20 : 7,318.80 = 4,814.40 : x
  2. Step 2: Convert to fraction form
    4,879.20/7,318.80 = 4,814.40/x
  3. Step 3: Cross multiply
    4,879.20x = 7,318.80 × 4,814.40
  4. Step 4: Simplify right side
    4,879.20x = 35,235,630.72
  5. Step 5: Solve for x
    x = 35,235,630.72/4,879.20
  6. Step 6: Final answer
    x = 7,221.60

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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.