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Finding the Fourth Proportional to 623.46, 935.21 and 276.80

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Solution

The fourth proportional to 623.46, 935.21 and 276.80 is: 415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.46 : 935.21 = 276.80 : x
  2. Step 2: Convert to fraction form
    623.46/935.21 = 276.80/x
  3. Step 3: Cross multiply
    623.46x = 935.21 × 276.80
  4. Step 4: Simplify right side
    623.46x = 258,861.45
  5. Step 5: Solve for x
    x = 258,861.45/623.46
  6. Step 6: Final answer
    x = 415.20

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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.