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Finding the Fourth Proportional to 1,179,144, 1,627,220.34 and 642,600

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Solution

The fourth proportional to 1,179,144, 1,627,220.34 and 642,600 is: 886,788.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179,144 : 1,627,220.34 = 642,600 : x
  2. Step 2: Convert to fraction form
    1,179,144/1,627,220.34 = 642,600/x
  3. Step 3: Cross multiply
    1,179,144x = 1,627,220.34 × 642,600
  4. Step 4: Simplify right side
    1,179,144x = 1,045,651,790,484
  5. Step 5: Solve for x
    x = 1,045,651,790,484/1,179,144
  6. Step 6: Final answer
    x = 886,788.88

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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.