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Finding the Fourth Proportional to 647.73, 893.31 and 437.85

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Solution

The fourth proportional to 647.73, 893.31 and 437.85 is: 603.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.73 : 893.31 = 437.85 : x
  2. Step 2: Convert to fraction form
    647.73/893.31 = 437.85/x
  3. Step 3: Cross multiply
    647.73x = 893.31 × 437.85
  4. Step 4: Simplify right side
    647.73x = 391,135.78
  5. Step 5: Solve for x
    x = 391,135.78/647.73
  6. Step 6: Final answer
    x = 603.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.