Home / 1,769.24-2,650.80-1,420.76

Finding the Fourth Proportional to 1,769.24, 2,650.80 and 1,420.76

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Solution

The fourth proportional to 1,769.24, 2,650.80 and 1,420.76 is: 2,128.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.24 : 2,650.80 = 1,420.76 : x
  2. Step 2: Convert to fraction form
    1,769.24/2,650.80 = 1,420.76/x
  3. Step 3: Cross multiply
    1,769.24x = 2,650.80 × 1,420.76
  4. Step 4: Simplify right side
    1,769.24x = 3,766,150.61
  5. Step 5: Solve for x
    x = 3,766,150.61/1,769.24
  6. Step 6: Final answer
    x = 2,128.68

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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.