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Finding the Fourth Proportional to 389,555.38, 584,325.78 and 123,331.87

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Solution

The fourth proportional to 389,555.38, 584,325.78 and 123,331.87 is: 184,995.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,555.38 : 584,325.78 = 123,331.87 : x
  2. Step 2: Convert to fraction form
    389,555.38/584,325.78 = 123,331.87/x
  3. Step 3: Cross multiply
    389,555.38x = 584,325.78 × 123,331.87
  4. Step 4: Simplify right side
    389,555.38x = 72,065,991,136.61
  5. Step 5: Solve for x
    x = 72,065,991,136.61/389,555.38
  6. Step 6: Final answer
    x = 184,995.50

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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.