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Finding the Fourth Proportional to 1,331.57, 1,995.76 and 940.98

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Solution

The fourth proportional to 1,331.57, 1,995.76 and 940.98 is: 1,410.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.57 : 1,995.76 = 940.98 : x
  2. Step 2: Convert to fraction form
    1,331.57/1,995.76 = 940.98/x
  3. Step 3: Cross multiply
    1,331.57x = 1,995.76 × 940.98
  4. Step 4: Simplify right side
    1,331.57x = 1,877,975.60
  5. Step 5: Solve for x
    x = 1,877,975.60/1,331.57
  6. Step 6: Final answer
    x = 1,410.35

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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.