Home / 1,918.30-2,875.20-1,897.78

Finding the Fourth Proportional to 1,918.30, 2,875.20 and 1,897.78

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Solution

The fourth proportional to 1,918.30, 2,875.20 and 1,897.78 is: 2,844.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.30 : 2,875.20 = 1,897.78 : x
  2. Step 2: Convert to fraction form
    1,918.30/2,875.20 = 1,897.78/x
  3. Step 3: Cross multiply
    1,918.30x = 2,875.20 × 1,897.78
  4. Step 4: Simplify right side
    1,918.30x = 5,456,497.06
  5. Step 5: Solve for x
    x = 5,456,497.06/1,918.30
  6. Step 6: Final answer
    x = 2,844.44

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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.