Home / 1,039.23-1,559.13-519.09

Finding the Fourth Proportional to 1,039.23, 1,559.13 and 519.09

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Solution

The fourth proportional to 1,039.23, 1,559.13 and 519.09 is: 778.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.23 : 1,559.13 = 519.09 : x
  2. Step 2: Convert to fraction form
    1,039.23/1,559.13 = 519.09/x
  3. Step 3: Cross multiply
    1,039.23x = 1,559.13 × 519.09
  4. Step 4: Simplify right side
    1,039.23x = 809,328.79
  5. Step 5: Solve for x
    x = 809,328.79/1,039.23
  6. Step 6: Final answer
    x = 778.78

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1.5x scale

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.