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Finding the Fourth Proportional to 389,235.75, 584,115.66 and 136,518.59

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Solution

The fourth proportional to 389,235.75, 584,115.66 and 136,518.59 is: 204,869.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,235.75 : 584,115.66 = 136,518.59 : x
  2. Step 2: Convert to fraction form
    389,235.75/584,115.66 = 136,518.59/x
  3. Step 3: Cross multiply
    389,235.75x = 584,115.66 × 136,518.59
  4. Step 4: Simplify right side
    389,235.75x = 79,742,643,379.54
  5. Step 5: Solve for x
    x = 79,742,643,379.54/389,235.75
  6. Step 6: Final answer
    x = 204,869.78

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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.