Home / 3,929.79-5,423.00-2,228.61

Finding the Fourth Proportional to 3,929.79, 5,423.00 and 2,228.61

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Solution

The fourth proportional to 3,929.79, 5,423.00 and 2,228.61 is: 3,075.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.79 : 5,423.00 = 2,228.61 : x
  2. Step 2: Convert to fraction form
    3,929.79/5,423.00 = 2,228.61/x
  3. Step 3: Cross multiply
    3,929.79x = 5,423.00 × 2,228.61
  4. Step 4: Simplify right side
    3,929.79x = 12,085,740.05
  5. Step 5: Solve for x
    x = 12,085,740.05/3,929.79
  6. Step 6: Final answer
    x = 3,075.42

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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.