Home / 1,956.45-2,698.47-1,248.78

Finding the Fourth Proportional to 1,956.45, 2,698.47 and 1,248.78

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Solution

The fourth proportional to 1,956.45, 2,698.47 and 1,248.78 is: 1,722.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.45 : 2,698.47 = 1,248.78 : x
  2. Step 2: Convert to fraction form
    1,956.45/2,698.47 = 1,248.78/x
  3. Step 3: Cross multiply
    1,956.45x = 2,698.47 × 1,248.78
  4. Step 4: Simplify right side
    1,956.45x = 3,369,795.37
  5. Step 5: Solve for x
    x = 3,369,795.37/1,956.45
  6. Step 6: Final answer
    x = 1,722.40

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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.