Home / 3,320.79-4,580.71-2,139.81

Finding the Fourth Proportional to 3,320.79, 4,580.71 and 2,139.81

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Solution

The fourth proportional to 3,320.79, 4,580.71 and 2,139.81 is: 2,951.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.79 : 4,580.71 = 2,139.81 : x
  2. Step 2: Convert to fraction form
    3,320.79/4,580.71 = 2,139.81/x
  3. Step 3: Cross multiply
    3,320.79x = 4,580.71 × 2,139.81
  4. Step 4: Simplify right side
    3,320.79x = 9,801,849.07
  5. Step 5: Solve for x
    x = 9,801,849.07/3,320.79
  6. Step 6: Final answer
    x = 2,951.66

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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.