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Finding the Fourth Proportional to 485.27, 670.05 and 298.84

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Solution

The fourth proportional to 485.27, 670.05 and 298.84 is: 412.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.27 : 670.05 = 298.84 : x
  2. Step 2: Convert to fraction form
    485.27/670.05 = 298.84/x
  3. Step 3: Cross multiply
    485.27x = 670.05 × 298.84
  4. Step 4: Simplify right side
    485.27x = 200,237.74
  5. Step 5: Solve for x
    x = 200,237.74/485.27
  6. Step 6: Final answer
    x = 412.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.