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Finding the Fourth Proportional to 644,246.40, 967,147.20 and 639,580.80

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Solution

The fourth proportional to 644,246.40, 967,147.20 and 639,580.80 is: 960,143.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,246.40 : 967,147.20 = 639,580.80 : x
  2. Step 2: Convert to fraction form
    644,246.40/967,147.20 = 639,580.80/x
  3. Step 3: Cross multiply
    644,246.40x = 967,147.20 × 639,580.80
  4. Step 4: Simplify right side
    644,246.40x = 618,568,779,893.76
  5. Step 5: Solve for x
    x = 618,568,779,893.76/644,246.40
  6. Step 6: Final answer
    x = 960,143.17

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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.