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Finding the Fourth Proportional to 402.47, 554.50 and 328.66

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Solution

The fourth proportional to 402.47, 554.50 and 328.66 is: 452.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.47 : 554.50 = 328.66 : x
  2. Step 2: Convert to fraction form
    402.47/554.50 = 328.66/x
  3. Step 3: Cross multiply
    402.47x = 554.50 × 328.66
  4. Step 4: Simplify right side
    402.47x = 182,239.15
  5. Step 5: Solve for x
    x = 182,239.15/402.47
  6. Step 6: Final answer
    x = 452.80

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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.