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Finding the Fourth Proportional to 445,515.60, 668,273.40 and 220,789.20

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Solution

The fourth proportional to 445,515.60, 668,273.40 and 220,789.20 is: 331,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,515.60 : 668,273.40 = 220,789.20 : x
  2. Step 2: Convert to fraction form
    445,515.60/668,273.40 = 220,789.20/x
  3. Step 3: Cross multiply
    445,515.60x = 668,273.40 × 220,789.20
  4. Step 4: Simplify right side
    445,515.60x = 147,547,549,367.28
  5. Step 5: Solve for x
    x = 147,547,549,367.28/445,515.60
  6. Step 6: Final answer
    x = 331,183.80

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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.