Home / 1,838.20-2,756.43-712.99

Finding the Fourth Proportional to 1,838.20, 2,756.43 and 712.99

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Solution

The fourth proportional to 1,838.20, 2,756.43 and 712.99 is: 1,069.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.20 : 2,756.43 = 712.99 : x
  2. Step 2: Convert to fraction form
    1,838.20/2,756.43 = 712.99/x
  3. Step 3: Cross multiply
    1,838.20x = 2,756.43 × 712.99
  4. Step 4: Simplify right side
    1,838.20x = 1,965,307.03
  5. Step 5: Solve for x
    x = 1,965,307.03/1,838.20
  6. Step 6: Final answer
    x = 1,069.15

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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.