Home / 445,515.20-668,272.80-287,921.60

Finding the Fourth Proportional to 445,515.20, 668,272.80 and 287,921.60

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Solution

The fourth proportional to 445,515.20, 668,272.80 and 287,921.60 is: 431,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,515.20 : 668,272.80 = 287,921.60 : x
  2. Step 2: Convert to fraction form
    445,515.20/668,272.80 = 287,921.60/x
  3. Step 3: Cross multiply
    445,515.20x = 668,272.80 × 287,921.60
  4. Step 4: Simplify right side
    445,515.20x = 192,410,173,812.48
  5. Step 5: Solve for x
    x = 192,410,173,812.48/445,515.20
  6. Step 6: Final answer
    x = 431,882.40

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Similar ratio
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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.