Home / 1,905.16-2,628.98-1,285

Finding the Fourth Proportional to 1,905.16, 2,628.98 and 1,285

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Solution

The fourth proportional to 1,905.16, 2,628.98 and 1,285 is: 1,773.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.16 : 2,628.98 = 1,285 : x
  2. Step 2: Convert to fraction form
    1,905.16/2,628.98 = 1,285/x
  3. Step 3: Cross multiply
    1,905.16x = 2,628.98 × 1,285
  4. Step 4: Simplify right side
    1,905.16x = 3,378,239.30
  5. Step 5: Solve for x
    x = 3,378,239.30/1,905.16
  6. Step 6: Final answer
    x = 1,773.21

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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.