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Finding the Fourth Proportional to 476.48, 657.12 and 321.44

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Solution

The fourth proportional to 476.48, 657.12 and 321.44 is: 443.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.48 : 657.12 = 321.44 : x
  2. Step 2: Convert to fraction form
    476.48/657.12 = 321.44/x
  3. Step 3: Cross multiply
    476.48x = 657.12 × 321.44
  4. Step 4: Simplify right side
    476.48x = 211,224.65
  5. Step 5: Solve for x
    x = 211,224.65/476.48
  6. Step 6: Final answer
    x = 443.30

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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.