Home / 1,908.02-2,857.92-1,288.32

Finding the Fourth Proportional to 1,908.02, 2,857.92 and 1,288.32

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Solution

The fourth proportional to 1,908.02, 2,857.92 and 1,288.32 is: 1,929.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.02 : 2,857.92 = 1,288.32 : x
  2. Step 2: Convert to fraction form
    1,908.02/2,857.92 = 1,288.32/x
  3. Step 3: Cross multiply
    1,908.02x = 2,857.92 × 1,288.32
  4. Step 4: Simplify right side
    1,908.02x = 3,681,915.49
  5. Step 5: Solve for x
    x = 3,681,915.49/1,908.02
  6. Step 6: Final answer
    x = 1,929.70

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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.