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Finding the Fourth Proportional to 656,640.30, 984,960.45 and 445,133.10

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Solution

The fourth proportional to 656,640.30, 984,960.45 and 445,133.10 is: 667,699.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,640.30 : 984,960.45 = 445,133.10 : x
  2. Step 2: Convert to fraction form
    656,640.30/984,960.45 = 445,133.10/x
  3. Step 3: Cross multiply
    656,640.30x = 984,960.45 × 445,133.10
  4. Step 4: Simplify right side
    656,640.30x = 438,438,498,485.90
  5. Step 5: Solve for x
    x = 438,438,498,485.90/656,640.30
  6. Step 6: Final answer
    x = 667,699.65

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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.