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Finding the Fourth Proportional to 657.38, 986.08 and 188.85

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Solution

The fourth proportional to 657.38, 986.08 and 188.85 is: 283.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.38 : 986.08 = 188.85 : x
  2. Step 2: Convert to fraction form
    657.38/986.08 = 188.85/x
  3. Step 3: Cross multiply
    657.38x = 986.08 × 188.85
  4. Step 4: Simplify right side
    657.38x = 186,225.50
  5. Step 5: Solve for x
    x = 186,225.50/657.38
  6. Step 6: Final answer
    x = 283.28

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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.