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Finding the Fourth Proportional to 280.06, 420.12 and 158.44

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Solution

The fourth proportional to 280.06, 420.12 and 158.44 is: 237.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.06 : 420.12 = 158.44 : x
  2. Step 2: Convert to fraction form
    280.06/420.12 = 158.44/x
  3. Step 3: Cross multiply
    280.06x = 420.12 × 158.44
  4. Step 4: Simplify right side
    280.06x = 66,563.81
  5. Step 5: Solve for x
    x = 66,563.81/280.06
  6. Step 6: Final answer
    x = 237.68

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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.