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Finding the Fourth Proportional to 1,208,702.11, 1,667,973.61 and 664,837.73

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Solution

The fourth proportional to 1,208,702.11, 1,667,973.61 and 664,837.73 is: 917,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,702.11 : 1,667,973.61 = 664,837.73 : x
  2. Step 2: Convert to fraction form
    1,208,702.11/1,667,973.61 = 664,837.73/x
  3. Step 3: Cross multiply
    1,208,702.11x = 1,667,973.61 × 664,837.73
  4. Step 4: Simplify right side
    1,208,702.11x = 1,108,931,788,572.31
  5. Step 5: Solve for x
    x = 1,108,931,788,572.31/1,208,702.11
  6. Step 6: Final answer
    x = 917,456.65

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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.