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Finding the Fourth Proportional to 469.14, 646.38 and 321.52

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Solution

The fourth proportional to 469.14, 646.38 and 321.52 is: 442.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.14 : 646.38 = 321.52 : x
  2. Step 2: Convert to fraction form
    469.14/646.38 = 321.52/x
  3. Step 3: Cross multiply
    469.14x = 646.38 × 321.52
  4. Step 4: Simplify right side
    469.14x = 207,824.10
  5. Step 5: Solve for x
    x = 207,824.10/469.14
  6. Step 6: Final answer
    x = 442.99

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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.