Home / 1,531.23-2,112.93-942.09

Finding the Fourth Proportional to 1,531.23, 2,112.93 and 942.09

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Solution

The fourth proportional to 1,531.23, 2,112.93 and 942.09 is: 1,299.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.23 : 2,112.93 = 942.09 : x
  2. Step 2: Convert to fraction form
    1,531.23/2,112.93 = 942.09/x
  3. Step 3: Cross multiply
    1,531.23x = 2,112.93 × 942.09
  4. Step 4: Simplify right side
    1,531.23x = 1,990,570.22
  5. Step 5: Solve for x
    x = 1,990,570.22/1,531.23
  6. Step 6: Final answer
    x = 1,299.98

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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.