Home / 3,913.99-5,400.78-2,235.29

Finding the Fourth Proportional to 3,913.99, 5,400.78 and 2,235.29

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Solution

The fourth proportional to 3,913.99, 5,400.78 and 2,235.29 is: 3,084.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.99 : 5,400.78 = 2,235.29 : x
  2. Step 2: Convert to fraction form
    3,913.99/5,400.78 = 2,235.29/x
  3. Step 3: Cross multiply
    3,913.99x = 5,400.78 × 2,235.29
  4. Step 4: Simplify right side
    3,913.99x = 12,072,309.53
  5. Step 5: Solve for x
    x = 12,072,309.53/3,913.99
  6. Step 6: Final answer
    x = 3,084.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.