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Finding the Fourth Proportional to 468.52, 646.55 and 321.20

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Solution

The fourth proportional to 468.52, 646.55 and 321.20 is: 443.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.52 : 646.55 = 321.20 : x
  2. Step 2: Convert to fraction form
    468.52/646.55 = 321.20/x
  3. Step 3: Cross multiply
    468.52x = 646.55 × 321.20
  4. Step 4: Simplify right side
    468.52x = 207,670.65
  5. Step 5: Solve for x
    x = 207,670.65/468.52
  6. Step 6: Final answer
    x = 443.25

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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.