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Finding the Fourth Proportional to 862,290.80, 1,293,630.60 and 263,279.60

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Solution

The fourth proportional to 862,290.80, 1,293,630.60 and 263,279.60 is: 394,978.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,290.80 : 1,293,630.60 = 263,279.60 : x
  2. Step 2: Convert to fraction form
    862,290.80/1,293,630.60 = 263,279.60/x
  3. Step 3: Cross multiply
    862,290.80x = 1,293,630.60 × 263,279.60
  4. Step 4: Simplify right side
    862,290.80x = 340,586,546,915.76
  5. Step 5: Solve for x
    x = 340,586,546,915.76/862,290.80
  6. Step 6: Final answer
    x = 394,978.76

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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.