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Finding the Fourth Proportional to 1,921.56, 2,879.95 and 933.56

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Solution

The fourth proportional to 1,921.56, 2,879.95 and 933.56 is: 1,399.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.56 : 2,879.95 = 933.56 : x
  2. Step 2: Convert to fraction form
    1,921.56/2,879.95 = 933.56/x
  3. Step 3: Cross multiply
    1,921.56x = 2,879.95 × 933.56
  4. Step 4: Simplify right side
    1,921.56x = 2,688,615.66
  5. Step 5: Solve for x
    x = 2,688,615.66/1,921.56
  6. Step 6: Final answer
    x = 1,399.19

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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.