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Finding the Fourth Proportional to 1,336,316.30, 1,845,638.87 and 905,849.09

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Solution

The fourth proportional to 1,336,316.30, 1,845,638.87 and 905,849.09 is: 1,251,103.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336,316.30 : 1,845,638.87 = 905,849.09 : x
  2. Step 2: Convert to fraction form
    1,336,316.30/1,845,638.87 = 905,849.09/x
  3. Step 3: Cross multiply
    1,336,316.30x = 1,845,638.87 × 905,849.09
  4. Step 4: Simplify right side
    1,336,316.30x = 1,671,870,284,021.83
  5. Step 5: Solve for x
    x = 1,671,870,284,021.83/1,336,316.30
  6. Step 6: Final answer
    x = 1,251,103.71

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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.