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Finding the Fourth Proportional to 572,773.17, 789,898.80 and 389,286.57

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Solution

The fourth proportional to 572,773.17, 789,898.80 and 389,286.57 is: 536,856.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,773.17 : 789,898.80 = 389,286.57 : x
  2. Step 2: Convert to fraction form
    572,773.17/789,898.80 = 389,286.57/x
  3. Step 3: Cross multiply
    572,773.17x = 789,898.80 × 389,286.57
  4. Step 4: Simplify right side
    572,773.17x = 307,496,994,499.12
  5. Step 5: Solve for x
    x = 307,496,994,499.12/572,773.17
  6. Step 6: Final answer
    x = 536,856.49

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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.