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Finding the Fourth Proportional to 485.06, 667.44 and 438.48

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Solution

The fourth proportional to 485.06, 667.44 and 438.48 is: 603.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.06 : 667.44 = 438.48 : x
  2. Step 2: Convert to fraction form
    485.06/667.44 = 438.48/x
  3. Step 3: Cross multiply
    485.06x = 667.44 × 438.48
  4. Step 4: Simplify right side
    485.06x = 292,659.09
  5. Step 5: Solve for x
    x = 292,659.09/485.06
  6. Step 6: Final answer
    x = 603.35

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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.