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Finding the Fourth Proportional to 550,739.86, 758,604.90 and 389,317.30

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Solution

The fourth proportional to 550,739.86, 758,604.90 and 389,317.30 is: 536,256.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,739.86 : 758,604.90 = 389,317.30 : x
  2. Step 2: Convert to fraction form
    550,739.86/758,604.90 = 389,317.30/x
  3. Step 3: Cross multiply
    550,739.86x = 758,604.90 × 389,317.30
  4. Step 4: Simplify right side
    550,739.86x = 295,338,011,434.77
  5. Step 5: Solve for x
    x = 295,338,011,434.77/550,739.86
  6. Step 6: Final answer
    x = 536,256.83

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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.