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Finding the Fourth Proportional to 619.68, 928.91 and 273.21

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Solution

The fourth proportional to 619.68, 928.91 and 273.21 is: 409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.68 : 928.91 = 273.21 : x
  2. Step 2: Convert to fraction form
    619.68/928.91 = 273.21/x
  3. Step 3: Cross multiply
    619.68x = 928.91 × 273.21
  4. Step 4: Simplify right side
    619.68x = 253,787.50
  5. Step 5: Solve for x
    x = 253,787.50/619.68
  6. Step 6: Final answer
    x = 409.55

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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.