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Finding the Fourth Proportional to 1,203,688, 1,661,089.44 and 667,144

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Solution

The fourth proportional to 1,203,688, 1,661,089.44 and 667,144 is: 920,658.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203,688 : 1,661,089.44 = 667,144 : x
  2. Step 2: Convert to fraction form
    1,203,688/1,661,089.44 = 667,144/x
  3. Step 3: Cross multiply
    1,203,688x = 1,661,089.44 × 667,144
  4. Step 4: Simplify right side
    1,203,688x = 1,108,185,853,359.36
  5. Step 5: Solve for x
    x = 1,108,185,853,359.36/1,203,688
  6. Step 6: Final answer
    x = 920,658.72

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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.