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Finding the Fourth Proportional to 485.07, 669.34 and 275.27

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Solution

The fourth proportional to 485.07, 669.34 and 275.27 is: 379.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.07 : 669.34 = 275.27 : x
  2. Step 2: Convert to fraction form
    485.07/669.34 = 275.27/x
  3. Step 3: Cross multiply
    485.07x = 669.34 × 275.27
  4. Step 4: Simplify right side
    485.07x = 184,249.22
  5. Step 5: Solve for x
    x = 184,249.22/485.07
  6. Step 6: Final answer
    x = 379.84

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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.