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Finding the Fourth Proportional to 572,428.89, 789,912.28 and 317,759.97

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Solution

The fourth proportional to 572,428.89, 789,912.28 and 317,759.97 is: 438,486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,428.89 : 789,912.28 = 317,759.97 : x
  2. Step 2: Convert to fraction form
    572,428.89/789,912.28 = 317,759.97/x
  3. Step 3: Cross multiply
    572,428.89x = 789,912.28 × 317,759.97
  4. Step 4: Simplify right side
    572,428.89x = 251,002,502,395.43
  5. Step 5: Solve for x
    x = 251,002,502,395.43/572,428.89
  6. Step 6: Final answer
    x = 438,486.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.