Home / 1,531.09-2,110.33-1,172.05

Finding the Fourth Proportional to 1,531.09, 2,110.33 and 1,172.05

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Solution

The fourth proportional to 1,531.09, 2,110.33 and 1,172.05 is: 1,615.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.09 : 2,110.33 = 1,172.05 : x
  2. Step 2: Convert to fraction form
    1,531.09/2,110.33 = 1,172.05/x
  3. Step 3: Cross multiply
    1,531.09x = 2,110.33 × 1,172.05
  4. Step 4: Simplify right side
    1,531.09x = 2,473,413.74
  5. Step 5: Solve for x
    x = 2,473,413.74/1,531.09
  6. Step 6: Final answer
    x = 1,615.46

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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.