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Finding the Fourth Proportional to 389,740.67, 584,660.21 and 123,405.98

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Solution

The fourth proportional to 389,740.67, 584,660.21 and 123,405.98 is: 185,124.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,740.67 : 584,660.21 = 123,405.98 : x
  2. Step 2: Convert to fraction form
    389,740.67/584,660.21 = 123,405.98/x
  3. Step 3: Cross multiply
    389,740.67x = 584,660.21 × 123,405.98
  4. Step 4: Simplify right side
    389,740.67x = 72,150,567,026.68
  5. Step 5: Solve for x
    x = 72,150,567,026.68/389,740.67
  6. Step 6: Final answer
    x = 185,124.55

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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.