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Finding the Fourth Proportional to 2,159.36, 3,236.22 and 988.94

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Solution

The fourth proportional to 2,159.36, 3,236.22 and 988.94 is: 1,482.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.36 : 3,236.22 = 988.94 : x
  2. Step 2: Convert to fraction form
    2,159.36/3,236.22 = 988.94/x
  3. Step 3: Cross multiply
    2,159.36x = 3,236.22 × 988.94
  4. Step 4: Simplify right side
    2,159.36x = 3,200,427.41
  5. Step 5: Solve for x
    x = 3,200,427.41/2,159.36
  6. Step 6: Final answer
    x = 1,482.12

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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.