Home / 2,905.70-4,009.84-1,579.40

Finding the Fourth Proportional to 2,905.70, 4,009.84 and 1,579.40

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Solution

The fourth proportional to 2,905.70, 4,009.84 and 1,579.40 is: 2,179.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.70 : 4,009.84 = 1,579.40 : x
  2. Step 2: Convert to fraction form
    2,905.70/4,009.84 = 1,579.40/x
  3. Step 3: Cross multiply
    2,905.70x = 4,009.84 × 1,579.40
  4. Step 4: Simplify right side
    2,905.70x = 6,333,133.40
  5. Step 5: Solve for x
    x = 6,333,133.40/2,905.70
  6. Step 6: Final answer
    x = 2,179.56

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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.