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Finding the Fourth Proportional to 467.90, 646.27 and 321.02

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Solution

The fourth proportional to 467.90, 646.27 and 321.02 is: 443.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.90 : 646.27 = 321.02 : x
  2. Step 2: Convert to fraction form
    467.90/646.27 = 321.02/x
  3. Step 3: Cross multiply
    467.90x = 646.27 × 321.02
  4. Step 4: Simplify right side
    467.90x = 207,461.56
  5. Step 5: Solve for x
    x = 207,461.56/467.90
  6. Step 6: Final answer
    x = 443.39

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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.