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Finding the Fourth Proportional to 1,866.09, 2,799.60 and 942.15

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Solution

The fourth proportional to 1,866.09, 2,799.60 and 942.15 is: 1,413.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.09 : 2,799.60 = 942.15 : x
  2. Step 2: Convert to fraction form
    1,866.09/2,799.60 = 942.15/x
  3. Step 3: Cross multiply
    1,866.09x = 2,799.60 × 942.15
  4. Step 4: Simplify right side
    1,866.09x = 2,637,643.14
  5. Step 5: Solve for x
    x = 2,637,643.14/1,866.09
  6. Step 6: Final answer
    x = 1,413.46

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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.