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Finding the Fourth Proportional to 328.25, 491.67 and 302.74

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Solution

The fourth proportional to 328.25, 491.67 and 302.74 is: 453.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.25 : 491.67 = 302.74 : x
  2. Step 2: Convert to fraction form
    328.25/491.67 = 302.74/x
  3. Step 3: Cross multiply
    328.25x = 491.67 × 302.74
  4. Step 4: Simplify right side
    328.25x = 148,846.95
  5. Step 5: Solve for x
    x = 148,846.95/328.25
  6. Step 6: Final answer
    x = 453.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.