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Finding the Fourth Proportional to 328.66, 453.33 and 210.67

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Solution

The fourth proportional to 328.66, 453.33 and 210.67 is: 290.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.66 : 453.33 = 210.67 : x
  2. Step 2: Convert to fraction form
    328.66/453.33 = 210.67/x
  3. Step 3: Cross multiply
    328.66x = 453.33 × 210.67
  4. Step 4: Simplify right side
    328.66x = 95,501.90
  5. Step 5: Solve for x
    x = 95,501.90/328.66
  6. Step 6: Final answer
    x = 290.58

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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.