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Finding the Fourth Proportional to 405,076.62, 607,239.30 and 138,773.85

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Solution

The fourth proportional to 405,076.62, 607,239.30 and 138,773.85 is: 208,032.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,076.62 : 607,239.30 = 138,773.85 : x
  2. Step 2: Convert to fraction form
    405,076.62/607,239.30 = 138,773.85/x
  3. Step 3: Cross multiply
    405,076.62x = 607,239.30 × 138,773.85
  4. Step 4: Simplify right side
    405,076.62x = 84,268,935,532.31
  5. Step 5: Solve for x
    x = 84,268,935,532.31/405,076.62
  6. Step 6: Final answer
    x = 208,032.09

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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.