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Finding the Fourth Proportional to 389,495.57, 584,184.89 and 123,221.49

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Solution

The fourth proportional to 389,495.57, 584,184.89 and 123,221.49 is: 184,813.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,495.57 : 584,184.89 = 123,221.49 : x
  2. Step 2: Convert to fraction form
    389,495.57/584,184.89 = 123,221.49/x
  3. Step 3: Cross multiply
    389,495.57x = 584,184.89 × 123,221.49
  4. Step 4: Simplify right side
    389,495.57x = 71,984,131,965.18
  5. Step 5: Solve for x
    x = 71,984,131,965.18/389,495.57
  6. Step 6: Final answer
    x = 184,813.74

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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.