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Finding the Fourth Proportional to 996.38, 1,495.23 and 988.68

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Solution

The fourth proportional to 996.38, 1,495.23 and 988.68 is: 1,483.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.38 : 1,495.23 = 988.68 : x
  2. Step 2: Convert to fraction form
    996.38/1,495.23 = 988.68/x
  3. Step 3: Cross multiply
    996.38x = 1,495.23 × 988.68
  4. Step 4: Simplify right side
    996.38x = 1,478,304.00
  5. Step 5: Solve for x
    x = 1,478,304.00/996.38
  6. Step 6: Final answer
    x = 1,483.67

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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.