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Finding the Fourth Proportional to 285,466.50, 428,183.28 and 85,782.60

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Solution

The fourth proportional to 285,466.50, 428,183.28 and 85,782.60 is: 128,668.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,466.50 : 428,183.28 = 85,782.60 : x
  2. Step 2: Convert to fraction form
    285,466.50/428,183.28 = 85,782.60/x
  3. Step 3: Cross multiply
    285,466.50x = 428,183.28 × 85,782.60
  4. Step 4: Simplify right side
    285,466.50x = 36,730,675,034.93
  5. Step 5: Solve for x
    x = 36,730,675,034.93/285,466.50
  6. Step 6: Final answer
    x = 128,668.95

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.