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Finding the Fourth Proportional to 619.80, 930.24 and 254.85

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Solution

The fourth proportional to 619.80, 930.24 and 254.85 is: 382.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.80 : 930.24 = 254.85 : x
  2. Step 2: Convert to fraction form
    619.80/930.24 = 254.85/x
  3. Step 3: Cross multiply
    619.80x = 930.24 × 254.85
  4. Step 4: Simplify right side
    619.80x = 237,071.66
  5. Step 5: Solve for x
    x = 237,071.66/619.80
  6. Step 6: Final answer
    x = 382.50

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Double scale
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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.