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Finding the Fourth Proportional to 644,234.40, 967,129.20 and 639,568.80

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Solution

The fourth proportional to 644,234.40, 967,129.20 and 639,568.80 is: 960,125.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,234.40 : 967,129.20 = 639,568.80 : x
  2. Step 2: Convert to fraction form
    644,234.40/967,129.20 = 639,568.80/x
  3. Step 3: Cross multiply
    644,234.40x = 967,129.20 × 639,568.80
  4. Step 4: Simplify right side
    644,234.40x = 618,545,661,888.96
  5. Step 5: Solve for x
    x = 618,545,661,888.96/644,234.40
  6. Step 6: Final answer
    x = 960,125.17

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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.