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Finding the Fourth Proportional to 1,375,961.15, 1,899,725.73 and 893,900.18

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Solution

The fourth proportional to 1,375,961.15, 1,899,725.73 and 893,900.18 is: 1,234,166.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,961.15 : 1,899,725.73 = 893,900.18 : x
  2. Step 2: Convert to fraction form
    1,375,961.15/1,899,725.73 = 893,900.18/x
  3. Step 3: Cross multiply
    1,375,961.15x = 1,899,725.73 × 893,900.18
  4. Step 4: Simplify right side
    1,375,961.15x = 1,698,165,171,997.63
  5. Step 5: Solve for x
    x = 1,698,165,171,997.63/1,375,961.15
  6. Step 6: Final answer
    x = 1,234,166.51

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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.