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Finding the Fourth Proportional to 1,159,418.80, 1,739,905.80 and 685,601.20

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Solution

The fourth proportional to 1,159,418.80, 1,739,905.80 and 685,601.20 is: 1,028,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159,418.80 : 1,739,905.80 = 685,601.20 : x
  2. Step 2: Convert to fraction form
    1,159,418.80/1,739,905.80 = 685,601.20/x
  3. Step 3: Cross multiply
    1,159,418.80x = 1,739,905.80 × 685,601.20
  4. Step 4: Simplify right side
    1,159,418.80x = 1,192,881,504,366.96
  5. Step 5: Solve for x
    x = 1,192,881,504,366.96/1,159,418.80
  6. Step 6: Final answer
    x = 1,028,861.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.