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Finding the Fourth Proportional to 437,603.88, 656,405.94 and 138,107.82

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Solution

The fourth proportional to 437,603.88, 656,405.94 and 138,107.82 is: 207,161.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,603.88 : 656,405.94 = 138,107.82 : x
  2. Step 2: Convert to fraction form
    437,603.88/656,405.94 = 138,107.82/x
  3. Step 3: Cross multiply
    437,603.88x = 656,405.94 × 138,107.82
  4. Step 4: Simplify right side
    437,603.88x = 90,654,793,408.45
  5. Step 5: Solve for x
    x = 90,654,793,408.45/437,603.88
  6. Step 6: Final answer
    x = 207,161.77

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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.