Home / 3,511.50-5,267.78-1,320.38

Finding the Fourth Proportional to 3,511.50, 5,267.78 and 1,320.38

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Solution

The fourth proportional to 3,511.50, 5,267.78 and 1,320.38 is: 1,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,511.50 : 5,267.78 = 1,320.38 : x
  2. Step 2: Convert to fraction form
    3,511.50/5,267.78 = 1,320.38/x
  3. Step 3: Cross multiply
    3,511.50x = 5,267.78 × 1,320.38
  4. Step 4: Simplify right side
    3,511.50x = 6,955,471.36
  5. Step 5: Solve for x
    x = 6,955,471.36/3,511.50
  6. Step 6: Final answer
    x = 1,980.77

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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.