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Finding the Fourth Proportional to 280.10, 420 and 97.44

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Solution

The fourth proportional to 280.10, 420 and 97.44 is: 146.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.10 : 420 = 97.44 : x
  2. Step 2: Convert to fraction form
    280.10/420 = 97.44/x
  3. Step 3: Cross multiply
    280.10x = 420 × 97.44
  4. Step 4: Simplify right side
    280.10x = 40,924.80
  5. Step 5: Solve for x
    x = 40,924.80/280.10
  6. Step 6: Final answer
    x = 146.11

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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.