Home / 1,288.89-1,777.33-1,102.99

Finding the Fourth Proportional to 1,288.89, 1,777.33 and 1,102.99

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Solution

The fourth proportional to 1,288.89, 1,777.33 and 1,102.99 is: 1,520.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.89 : 1,777.33 = 1,102.99 : x
  2. Step 2: Convert to fraction form
    1,288.89/1,777.33 = 1,102.99/x
  3. Step 3: Cross multiply
    1,288.89x = 1,777.33 × 1,102.99
  4. Step 4: Simplify right side
    1,288.89x = 1,960,377.22
  5. Step 5: Solve for x
    x = 1,960,377.22/1,288.89
  6. Step 6: Final answer
    x = 1,520.98

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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.