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Finding the Fourth Proportional to 328.48, 452.40 and 308.32

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Solution

The fourth proportional to 328.48, 452.40 and 308.32 is: 424.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.48 : 452.40 = 308.32 : x
  2. Step 2: Convert to fraction form
    328.48/452.40 = 308.32/x
  3. Step 3: Cross multiply
    328.48x = 452.40 × 308.32
  4. Step 4: Simplify right side
    328.48x = 139,483.97
  5. Step 5: Solve for x
    x = 139,483.97/328.48
  6. Step 6: Final answer
    x = 424.63

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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.