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Finding the Fourth Proportional to 321.51, 443.74 and 210.94

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Solution

The fourth proportional to 321.51, 443.74 and 210.94 is: 291.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.51 : 443.74 = 210.94 : x
  2. Step 2: Convert to fraction form
    321.51/443.74 = 210.94/x
  3. Step 3: Cross multiply
    321.51x = 443.74 × 210.94
  4. Step 4: Simplify right side
    321.51x = 93,602.52
  5. Step 5: Solve for x
    x = 93,602.52/321.51
  6. Step 6: Final answer
    x = 291.13

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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.