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Finding the Fourth Proportional to 328.47, 453.33 and 188.61

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Solution

The fourth proportional to 328.47, 453.33 and 188.61 is: 260.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.47 : 453.33 = 188.61 : x
  2. Step 2: Convert to fraction form
    328.47/453.33 = 188.61/x
  3. Step 3: Cross multiply
    328.47x = 453.33 × 188.61
  4. Step 4: Simplify right side
    328.47x = 85,502.57
  5. Step 5: Solve for x
    x = 85,502.57/328.47
  6. Step 6: Final answer
    x = 260.31

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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.