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Finding the Fourth Proportional to 485.88, 665.64 and 467.39

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Solution

The fourth proportional to 485.88, 665.64 and 467.39 is: 640.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.88 : 665.64 = 467.39 : x
  2. Step 2: Convert to fraction form
    485.88/665.64 = 467.39/x
  3. Step 3: Cross multiply
    485.88x = 665.64 × 467.39
  4. Step 4: Simplify right side
    485.88x = 311,110.15
  5. Step 5: Solve for x
    x = 311,110.15/485.88
  6. Step 6: Final answer
    x = 640.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.