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Finding the Fourth Proportional to 550,720.86, 758,578.68 and 389,298.30

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Solution

The fourth proportional to 550,720.86, 758,578.68 and 389,298.30 is: 536,230.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,720.86 : 758,578.68 = 389,298.30 : x
  2. Step 2: Convert to fraction form
    550,720.86/758,578.68 = 389,298.30/x
  3. Step 3: Cross multiply
    550,720.86x = 758,578.68 × 389,298.30
  4. Step 4: Simplify right side
    550,720.86x = 295,313,390,540.24
  5. Step 5: Solve for x
    x = 295,313,390,540.24/550,720.86
  6. Step 6: Final answer
    x = 536,230.62

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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.