Home / 1,947.85-2,688.01-1,201.51

Finding the Fourth Proportional to 1,947.85, 2,688.01 and 1,201.51

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Solution

The fourth proportional to 1,947.85, 2,688.01 and 1,201.51 is: 1,658.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.85 : 2,688.01 = 1,201.51 : x
  2. Step 2: Convert to fraction form
    1,947.85/2,688.01 = 1,201.51/x
  3. Step 3: Cross multiply
    1,947.85x = 2,688.01 × 1,201.51
  4. Step 4: Simplify right side
    1,947.85x = 3,229,670.90
  5. Step 5: Solve for x
    x = 3,229,670.90/1,947.85
  6. Step 6: Final answer
    x = 1,658.07

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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.