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Finding the Fourth Proportional to 1,662.40, 2,293.86 and 999.19

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Solution

The fourth proportional to 1,662.40, 2,293.86 and 999.19 is: 1,378.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.40 : 2,293.86 = 999.19 : x
  2. Step 2: Convert to fraction form
    1,662.40/2,293.86 = 999.19/x
  3. Step 3: Cross multiply
    1,662.40x = 2,293.86 × 999.19
  4. Step 4: Simplify right side
    1,662.40x = 2,292,001.97
  5. Step 5: Solve for x
    x = 2,292,001.97/1,662.40
  6. Step 6: Final answer
    x = 1,378.73

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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.