Home / 1,921.55-2,651.78-1,070.86

Finding the Fourth Proportional to 1,921.55, 2,651.78 and 1,070.86

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Solution

The fourth proportional to 1,921.55, 2,651.78 and 1,070.86 is: 1,477.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.55 : 2,651.78 = 1,070.86 : x
  2. Step 2: Convert to fraction form
    1,921.55/2,651.78 = 1,070.86/x
  3. Step 3: Cross multiply
    1,921.55x = 2,651.78 × 1,070.86
  4. Step 4: Simplify right side
    1,921.55x = 2,839,683.93
  5. Step 5: Solve for x
    x = 2,839,683.93/1,921.55
  6. Step 6: Final answer
    x = 1,477.81

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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.