Home / 2,830.40-3,901.84-2,043.20

Finding the Fourth Proportional to 2,830.40, 3,901.84 and 2,043.20

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Solution

The fourth proportional to 2,830.40, 3,901.84 and 2,043.20 is: 2,816.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.40 : 3,901.84 = 2,043.20 : x
  2. Step 2: Convert to fraction form
    2,830.40/3,901.84 = 2,043.20/x
  3. Step 3: Cross multiply
    2,830.40x = 3,901.84 × 2,043.20
  4. Step 4: Simplify right side
    2,830.40x = 7,972,239.49
  5. Step 5: Solve for x
    x = 7,972,239.49/2,830.40
  6. Step 6: Final answer
    x = 2,816.65

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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.