Home / 2,315.12-3,477.80-1,288.56

Finding the Fourth Proportional to 2,315.12, 3,477.80 and 1,288.56

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Solution

The fourth proportional to 2,315.12, 3,477.80 and 1,288.56 is: 1,935.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.12 : 3,477.80 = 1,288.56 : x
  2. Step 2: Convert to fraction form
    2,315.12/3,477.80 = 1,288.56/x
  3. Step 3: Cross multiply
    2,315.12x = 3,477.80 × 1,288.56
  4. Step 4: Simplify right side
    2,315.12x = 4,481,353.97
  5. Step 5: Solve for x
    x = 4,481,353.97/2,315.12
  6. Step 6: Final answer
    x = 1,935.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.