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Finding the Fourth Proportional to 438,936.46, 658,404.72 and 123,393.40

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Solution

The fourth proportional to 438,936.46, 658,404.72 and 123,393.40 is: 185,090.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,936.46 : 658,404.72 = 123,393.40 : x
  2. Step 2: Convert to fraction form
    438,936.46/658,404.72 = 123,393.40/x
  3. Step 3: Cross multiply
    438,936.46x = 658,404.72 × 123,393.40
  4. Step 4: Simplify right side
    438,936.46x = 81,242,796,976.85
  5. Step 5: Solve for x
    x = 81,242,796,976.85/438,936.46
  6. Step 6: Final answer
    x = 185,090.11

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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.