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Finding the Fourth Proportional to 1,328.46, 1,993.63 and 1,071.56

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Solution

The fourth proportional to 1,328.46, 1,993.63 and 1,071.56 is: 1,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.46 : 1,993.63 = 1,071.56 : x
  2. Step 2: Convert to fraction form
    1,328.46/1,993.63 = 1,071.56/x
  3. Step 3: Cross multiply
    1,328.46x = 1,993.63 × 1,071.56
  4. Step 4: Simplify right side
    1,328.46x = 2,136,294.16
  5. Step 5: Solve for x
    x = 2,136,294.16/1,328.46
  6. Step 6: Final answer
    x = 1,608.10

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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.