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Finding the Fourth Proportional to 619.48, 928.74 and 254.08

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Solution

The fourth proportional to 619.48, 928.74 and 254.08 is: 380.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.48 : 928.74 = 254.08 : x
  2. Step 2: Convert to fraction form
    619.48/928.74 = 254.08/x
  3. Step 3: Cross multiply
    619.48x = 928.74 × 254.08
  4. Step 4: Simplify right side
    619.48x = 235,974.26
  5. Step 5: Solve for x
    x = 235,974.26/619.48
  6. Step 6: Final answer
    x = 380.92

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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.