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Finding the Fourth Proportional to 447,783.99, 671,938.43 and 321,287.91

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Solution

The fourth proportional to 447,783.99, 671,938.43 and 321,287.91 is: 482,120.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,783.99 : 671,938.43 = 321,287.91 : x
  2. Step 2: Convert to fraction form
    447,783.99/671,938.43 = 321,287.91/x
  3. Step 3: Cross multiply
    447,783.99x = 671,938.43 × 321,287.91
  4. Step 4: Simplify right side
    447,783.99x = 215,885,692,216.94
  5. Step 5: Solve for x
    x = 215,885,692,216.94/447,783.99
  6. Step 6: Final answer
    x = 482,120.17

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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.