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Finding the Fourth Proportional to 572,765.92, 789,888.78 and 389,279.32

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Solution

The fourth proportional to 572,765.92, 789,888.78 and 389,279.32 is: 536,846.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,765.92 : 789,888.78 = 389,279.32 : x
  2. Step 2: Convert to fraction form
    572,765.92/789,888.78 = 389,279.32/x
  3. Step 3: Cross multiply
    572,765.92x = 789,888.78 × 389,279.32
  4. Step 4: Simplify right side
    572,765.92x = 307,487,367,154.03
  5. Step 5: Solve for x
    x = 307,487,367,154.03/572,765.92
  6. Step 6: Final answer
    x = 536,846.48

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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.