Home / 3,519.99-5,280.80-1,328.76

Finding the Fourth Proportional to 3,519.99, 5,280.80 and 1,328.76

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Solution

The fourth proportional to 3,519.99, 5,280.80 and 1,328.76 is: 1,993.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.99 : 5,280.80 = 1,328.76 : x
  2. Step 2: Convert to fraction form
    3,519.99/5,280.80 = 1,328.76/x
  3. Step 3: Cross multiply
    3,519.99x = 5,280.80 × 1,328.76
  4. Step 4: Simplify right side
    3,519.99x = 7,016,909.16
  5. Step 5: Solve for x
    x = 7,016,909.16/3,519.99
  6. Step 6: Final answer
    x = 1,993.45

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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.