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Finding the Fourth Proportional to 387,558.40, 580,985.92 and 345,568

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Solution

The fourth proportional to 387,558.40, 580,985.92 and 345,568 is: 518,038.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,558.40 : 580,985.92 = 345,568 : x
  2. Step 2: Convert to fraction form
    387,558.40/580,985.92 = 345,568/x
  3. Step 3: Cross multiply
    387,558.40x = 580,985.92 × 345,568
  4. Step 4: Simplify right side
    387,558.40x = 200,770,142,402.56
  5. Step 5: Solve for x
    x = 200,770,142,402.56/387,558.40
  6. Step 6: Final answer
    x = 518,038.42

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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.