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Finding the Fourth Proportional to 1,959.36, 2,938.88 and 919.59

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Solution

The fourth proportional to 1,959.36, 2,938.88 and 919.59 is: 1,379.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.36 : 2,938.88 = 919.59 : x
  2. Step 2: Convert to fraction form
    1,959.36/2,938.88 = 919.59/x
  3. Step 3: Cross multiply
    1,959.36x = 2,938.88 × 919.59
  4. Step 4: Simplify right side
    1,959.36x = 2,702,555.94
  5. Step 5: Solve for x
    x = 2,702,555.94/1,959.36
  6. Step 6: Final answer
    x = 1,379.31

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1.5x scale

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.