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Finding the Fourth Proportional to 1,316,945.86, 1,817,375.61 and 743,975.62

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Solution

The fourth proportional to 1,316,945.86, 1,817,375.61 and 743,975.62 is: 1,026,680.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316,945.86 : 1,817,375.61 = 743,975.62 : x
  2. Step 2: Convert to fraction form
    1,316,945.86/1,817,375.61 = 743,975.62/x
  3. Step 3: Cross multiply
    1,316,945.86x = 1,817,375.61 × 743,975.62
  4. Step 4: Simplify right side
    1,316,945.86x = 1,352,083,146,222.63
  5. Step 5: Solve for x
    x = 1,352,083,146,222.63/1,316,945.86
  6. Step 6: Final answer
    x = 1,026,680.89

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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.