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Finding the Fourth Proportional to 638,491.80, 957,603.30 and 322,651.80

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Solution

The fourth proportional to 638,491.80, 957,603.30 and 322,651.80 is: 483,909.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,491.80 : 957,603.30 = 322,651.80 : x
  2. Step 2: Convert to fraction form
    638,491.80/957,603.30 = 322,651.80/x
  3. Step 3: Cross multiply
    638,491.80x = 957,603.30 × 322,651.80
  4. Step 4: Simplify right side
    638,491.80x = 308,972,428,430.94
  5. Step 5: Solve for x
    x = 308,972,428,430.94/638,491.80
  6. Step 6: Final answer
    x = 483,909.78

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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.