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Finding the Fourth Proportional to 620.98, 932.16 and 361.28

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Solution

The fourth proportional to 620.98, 932.16 and 361.28 is: 542.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.98 : 932.16 = 361.28 : x
  2. Step 2: Convert to fraction form
    620.98/932.16 = 361.28/x
  3. Step 3: Cross multiply
    620.98x = 932.16 × 361.28
  4. Step 4: Simplify right side
    620.98x = 336,770.76
  5. Step 5: Solve for x
    x = 336,770.76/620.98
  6. Step 6: Final answer
    x = 542.32

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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.