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Finding the Fourth Proportional to 1,203,903.56, 1,661,405.64 and 660,089

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Solution

The fourth proportional to 1,203,903.56, 1,661,405.64 and 660,089 is: 910,933.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203,903.56 : 1,661,405.64 = 660,089 : x
  2. Step 2: Convert to fraction form
    1,203,903.56/1,661,405.64 = 660,089/x
  3. Step 3: Cross multiply
    1,203,903.56x = 1,661,405.64 × 660,089
  4. Step 4: Simplify right side
    1,203,903.56x = 1,096,675,587,501.96
  5. Step 5: Solve for x
    x = 1,096,675,587,501.96/1,203,903.56
  6. Step 6: Final answer
    x = 910,933.09

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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.