Home / 1,384.24-2,076.72-518.80

Finding the Fourth Proportional to 1,384.24, 2,076.72 and 518.80

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Solution

The fourth proportional to 1,384.24, 2,076.72 and 518.80 is: 778.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.24 : 2,076.72 = 518.80 : x
  2. Step 2: Convert to fraction form
    1,384.24/2,076.72 = 518.80/x
  3. Step 3: Cross multiply
    1,384.24x = 2,076.72 × 518.80
  4. Step 4: Simplify right side
    1,384.24x = 1,077,402.34
  5. Step 5: Solve for x
    x = 1,077,402.34/1,384.24
  6. Step 6: Final answer
    x = 778.33

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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.