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Finding the Fourth Proportional to 454.06, 679.74 and 280.45

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Solution

The fourth proportional to 454.06, 679.74 and 280.45 is: 419.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.06 : 679.74 = 280.45 : x
  2. Step 2: Convert to fraction form
    454.06/679.74 = 280.45/x
  3. Step 3: Cross multiply
    454.06x = 679.74 × 280.45
  4. Step 4: Simplify right side
    454.06x = 190,633.08
  5. Step 5: Solve for x
    x = 190,633.08/454.06
  6. Step 6: Final answer
    x = 419.84

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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.