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Finding the Fourth Proportional to 280.08, 420.14 and 94.98

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Solution

The fourth proportional to 280.08, 420.14 and 94.98 is: 142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.08 : 420.14 = 94.98 : x
  2. Step 2: Convert to fraction form
    280.08/420.14 = 94.98/x
  3. Step 3: Cross multiply
    280.08x = 420.14 × 94.98
  4. Step 4: Simplify right side
    280.08x = 39,904.42
  5. Step 5: Solve for x
    x = 39,904.42/280.08
  6. Step 6: Final answer
    x = 142.48

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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.