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Finding the Fourth Proportional to 1,296,907.43, 1,789,658.01 and 723,983.90

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Solution

The fourth proportional to 1,296,907.43, 1,789,658.01 and 723,983.90 is: 999,056.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,907.43 : 1,789,658.01 = 723,983.90 : x
  2. Step 2: Convert to fraction form
    1,296,907.43/1,789,658.01 = 723,983.90/x
  3. Step 3: Cross multiply
    1,296,907.43x = 1,789,658.01 × 723,983.90
  4. Step 4: Simplify right side
    1,296,907.43x = 1,295,683,576,797.75
  5. Step 5: Solve for x
    x = 1,295,683,576,797.75/1,296,907.43
  6. Step 6: Final answer
    x = 999,056.33

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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.