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Finding the Fourth Proportional to 1,391,267.82, 1,919,945.31 and 771,112.53

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Solution

The fourth proportional to 1,391,267.82, 1,919,945.31 and 771,112.53 is: 1,064,132.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,267.82 : 1,919,945.31 = 771,112.53 : x
  2. Step 2: Convert to fraction form
    1,391,267.82/1,919,945.31 = 771,112.53/x
  3. Step 3: Cross multiply
    1,391,267.82x = 1,919,945.31 × 771,112.53
  4. Step 4: Simplify right side
    1,391,267.82x = 1,480,493,885,455.73
  5. Step 5: Solve for x
    x = 1,480,493,885,455.73/1,391,267.82
  6. Step 6: Final answer
    x = 1,064,132.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.