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Finding the Fourth Proportional to 1,169,986.70, 1,755,235.20 and 664,789.70

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Solution

The fourth proportional to 1,169,986.70, 1,755,235.20 and 664,789.70 is: 997,329.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169,986.70 : 1,755,235.20 = 664,789.70 : x
  2. Step 2: Convert to fraction form
    1,169,986.70/1,755,235.20 = 664,789.70/x
  3. Step 3: Cross multiply
    1,169,986.70x = 1,755,235.20 × 664,789.70
  4. Step 4: Simplify right side
    1,169,986.70x = 1,166,862,282,037.44
  5. Step 5: Solve for x
    x = 1,166,862,282,037.44/1,169,986.70
  6. Step 6: Final answer
    x = 997,329.53

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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.