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Finding the Fourth Proportional to 1,302,644.78, 1,797,749.53 and 819,623.96

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Solution

The fourth proportional to 1,302,644.78, 1,797,749.53 and 819,623.96 is: 1,131,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302,644.78 : 1,797,749.53 = 819,623.96 : x
  2. Step 2: Convert to fraction form
    1,302,644.78/1,797,749.53 = 819,623.96/x
  3. Step 3: Cross multiply
    1,302,644.78x = 1,797,749.53 × 819,623.96
  4. Step 4: Simplify right side
    1,302,644.78x = 1,473,478,584,570.49
  5. Step 5: Solve for x
    x = 1,473,478,584,570.49/1,302,644.78
  6. Step 6: Final answer
    x = 1,131,143.81

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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.