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Finding the Fourth Proportional to 2,913.64, 4,019.44 and 1,969.76

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Solution

The fourth proportional to 2,913.64, 4,019.44 and 1,969.76 is: 2,717.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.64 : 4,019.44 = 1,969.76 : x
  2. Step 2: Convert to fraction form
    2,913.64/4,019.44 = 1,969.76/x
  3. Step 3: Cross multiply
    2,913.64x = 4,019.44 × 1,969.76
  4. Step 4: Simplify right side
    2,913.64x = 7,917,335.19
  5. Step 5: Solve for x
    x = 7,917,335.19/2,913.64
  6. Step 6: Final answer
    x = 2,717.34

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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.