Home / 3,478.68-5,216.40-1,287.36

Finding the Fourth Proportional to 3,478.68, 5,216.40 and 1,287.36

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Solution

The fourth proportional to 3,478.68, 5,216.40 and 1,287.36 is: 1,930.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.68 : 5,216.40 = 1,287.36 : x
  2. Step 2: Convert to fraction form
    3,478.68/5,216.40 = 1,287.36/x
  3. Step 3: Cross multiply
    3,478.68x = 5,216.40 × 1,287.36
  4. Step 4: Simplify right side
    3,478.68x = 6,715,384.70
  5. Step 5: Solve for x
    x = 6,715,384.70/3,478.68
  6. Step 6: Final answer
    x = 1,930.44

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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.