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Finding the Fourth Proportional to 619.31, 928.96 and 157.07

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Solution

The fourth proportional to 619.31, 928.96 and 157.07 is: 235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.31 : 928.96 = 157.07 : x
  2. Step 2: Convert to fraction form
    619.31/928.96 = 157.07/x
  3. Step 3: Cross multiply
    619.31x = 928.96 × 157.07
  4. Step 4: Simplify right side
    619.31x = 145,913.68
  5. Step 5: Solve for x
    x = 145,913.68/619.31
  6. Step 6: Final answer
    x = 235.61

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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.