Home / 1,288.54-1,935.30-1,103.86

Finding the Fourth Proportional to 1,288.54, 1,935.30 and 1,103.86

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Solution

The fourth proportional to 1,288.54, 1,935.30 and 1,103.86 is: 1,657.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.54 : 1,935.30 = 1,103.86 : x
  2. Step 2: Convert to fraction form
    1,288.54/1,935.30 = 1,103.86/x
  3. Step 3: Cross multiply
    1,288.54x = 1,935.30 × 1,103.86
  4. Step 4: Simplify right side
    1,288.54x = 2,136,300.26
  5. Step 5: Solve for x
    x = 2,136,300.26/1,288.54
  6. Step 6: Final answer
    x = 1,657.92

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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.