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Finding the Fourth Proportional to 619.21, 928.80 and 157.01

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Solution

The fourth proportional to 619.21, 928.80 and 157.01 is: 235.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.21 : 928.80 = 157.01 : x
  2. Step 2: Convert to fraction form
    619.21/928.80 = 157.01/x
  3. Step 3: Cross multiply
    619.21x = 928.80 × 157.01
  4. Step 4: Simplify right side
    619.21x = 145,827.78
  5. Step 5: Solve for x
    x = 145,827.78/619.21
  6. Step 6: Final answer
    x = 235.51

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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.