Home / 3,913.63-5,399.95-2,320.78

Finding the Fourth Proportional to 3,913.63, 5,399.95 and 2,320.78

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Solution

The fourth proportional to 3,913.63, 5,399.95 and 2,320.78 is: 3,202.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.63 : 5,399.95 = 2,320.78 : x
  2. Step 2: Convert to fraction form
    3,913.63/5,399.95 = 2,320.78/x
  3. Step 3: Cross multiply
    3,913.63x = 5,399.95 × 2,320.78
  4. Step 4: Simplify right side
    3,913.63x = 12,532,095.96
  5. Step 5: Solve for x
    x = 12,532,095.96/3,913.63
  6. Step 6: Final answer
    x = 3,202.17

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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.