Home / 1,907.40-2,857.02-1,288.38

Finding the Fourth Proportional to 1,907.40, 2,857.02 and 1,288.38

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Solution

The fourth proportional to 1,907.40, 2,857.02 and 1,288.38 is: 1,929.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.40 : 2,857.02 = 1,288.38 : x
  2. Step 2: Convert to fraction form
    1,907.40/2,857.02 = 1,288.38/x
  3. Step 3: Cross multiply
    1,907.40x = 2,857.02 × 1,288.38
  4. Step 4: Simplify right side
    1,907.40x = 3,680,927.43
  5. Step 5: Solve for x
    x = 3,680,927.43/1,907.40
  6. Step 6: Final answer
    x = 1,929.81

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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.