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Finding the Fourth Proportional to 572,774.17, 789,900.18 and 389,287.57

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Solution

The fourth proportional to 572,774.17, 789,900.18 and 389,287.57 is: 536,857.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,774.17 : 789,900.18 = 389,287.57 : x
  2. Step 2: Convert to fraction form
    572,774.17/789,900.18 = 389,287.57/x
  3. Step 3: Cross multiply
    572,774.17x = 789,900.18 × 389,287.57
  4. Step 4: Simplify right side
    572,774.17x = 307,498,321,614.76
  5. Step 5: Solve for x
    x = 307,498,321,614.76/572,774.17
  6. Step 6: Final answer
    x = 536,857.87

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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.