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Finding the Fourth Proportional to 405,326.80, 607,932.60 and 124,872.40

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Solution

The fourth proportional to 405,326.80, 607,932.60 and 124,872.40 is: 187,290.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,326.80 : 607,932.60 = 124,872.40 : x
  2. Step 2: Convert to fraction form
    405,326.80/607,932.60 = 124,872.40/x
  3. Step 3: Cross multiply
    405,326.80x = 607,932.60 × 124,872.40
  4. Step 4: Simplify right side
    405,326.80x = 75,914,002,800.24
  5. Step 5: Solve for x
    x = 75,914,002,800.24/405,326.80
  6. Step 6: Final answer
    x = 187,290.85

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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.