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Finding the Fourth Proportional to 1,375,693.97, 1,898,365.16 and 763,815.11

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Solution

The fourth proportional to 1,375,693.97, 1,898,365.16 and 763,815.11 is: 1,054,013.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,693.97 : 1,898,365.16 = 763,815.11 : x
  2. Step 2: Convert to fraction form
    1,375,693.97/1,898,365.16 = 763,815.11/x
  3. Step 3: Cross multiply
    1,375,693.97x = 1,898,365.16 × 763,815.11
  4. Step 4: Simplify right side
    1,375,693.97x = 1,449,999,980,194.67
  5. Step 5: Solve for x
    x = 1,449,999,980,194.67/1,375,693.97
  6. Step 6: Final answer
    x = 1,054,013.48

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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.