Home / 2,178.06-3,005.70-1,621.02

Finding the Fourth Proportional to 2,178.06, 3,005.70 and 1,621.02

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Solution

The fourth proportional to 2,178.06, 3,005.70 and 1,621.02 is: 2,236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.06 : 3,005.70 = 1,621.02 : x
  2. Step 2: Convert to fraction form
    2,178.06/3,005.70 = 1,621.02/x
  3. Step 3: Cross multiply
    2,178.06x = 3,005.70 × 1,621.02
  4. Step 4: Simplify right side
    2,178.06x = 4,872,299.81
  5. Step 5: Solve for x
    x = 4,872,299.81/2,178.06
  6. Step 6: Final answer
    x = 2,236.99

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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.