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Finding the Fourth Proportional to 1,369.92, 1,889.10 and 996.24

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Solution

The fourth proportional to 1,369.92, 1,889.10 and 996.24 is: 1,373.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.92 : 1,889.10 = 996.24 : x
  2. Step 2: Convert to fraction form
    1,369.92/1,889.10 = 996.24/x
  3. Step 3: Cross multiply
    1,369.92x = 1,889.10 × 996.24
  4. Step 4: Simplify right side
    1,369.92x = 1,881,996.98
  5. Step 5: Solve for x
    x = 1,881,996.98/1,369.92
  6. Step 6: Final answer
    x = 1,373.80

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1.5x scale

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.