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Finding the Fourth Proportional to 1,208,654.06, 1,667,945.93 and 664,845.57

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Solution

The fourth proportional to 1,208,654.06, 1,667,945.93 and 664,845.57 is: 917,488.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,654.06 : 1,667,945.93 = 664,845.57 : x
  2. Step 2: Convert to fraction form
    1,208,654.06/1,667,945.93 = 664,845.57/x
  3. Step 3: Cross multiply
    1,208,654.06x = 1,667,945.93 × 664,845.57
  4. Step 4: Simplify right side
    1,208,654.06x = 1,108,926,459,235.80
  5. Step 5: Solve for x
    x = 1,108,926,459,235.80/1,208,654.06
  6. Step 6: Final answer
    x = 917,488.72

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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.