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Finding the Fourth Proportional to 657.66, 986.49 and 369.30

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Solution

The fourth proportional to 657.66, 986.49 and 369.30 is: 553.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.66 : 986.49 = 369.30 : x
  2. Step 2: Convert to fraction form
    657.66/986.49 = 369.30/x
  3. Step 3: Cross multiply
    657.66x = 986.49 × 369.30
  4. Step 4: Simplify right side
    657.66x = 364,310.76
  5. Step 5: Solve for x
    x = 364,310.76/657.66
  6. Step 6: Final answer
    x = 553.95

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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.