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Finding the Fourth Proportional to 1,174,654, 1,620,885 and 691,112.80

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Solution

The fourth proportional to 1,174,654, 1,620,885 and 691,112.80 is: 953,654.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174,654 : 1,620,885 = 691,112.80 : x
  2. Step 2: Convert to fraction form
    1,174,654/1,620,885 = 691,112.80/x
  3. Step 3: Cross multiply
    1,174,654x = 1,620,885 × 691,112.80
  4. Step 4: Simplify right side
    1,174,654x = 1,120,214,370,828
  5. Step 5: Solve for x
    x = 1,120,214,370,828/1,174,654
  6. Step 6: Final answer
    x = 953,654.75

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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.