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Finding the Fourth Proportional to 1,662.32, 2,293.48 and 999.32

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Solution

The fourth proportional to 1,662.32, 2,293.48 and 999.32 is: 1,378.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.32 : 2,293.48 = 999.32 : x
  2. Step 2: Convert to fraction form
    1,662.32/2,293.48 = 999.32/x
  3. Step 3: Cross multiply
    1,662.32x = 2,293.48 × 999.32
  4. Step 4: Simplify right side
    1,662.32x = 2,291,906.47
  5. Step 5: Solve for x
    x = 2,291,906.47/1,662.32
  6. Step 6: Final answer
    x = 1,378.74

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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.