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Finding the Fourth Proportional to 647.72, 893.84 and 352.96

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Solution

The fourth proportional to 647.72, 893.84 and 352.96 is: 487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.72 : 893.84 = 352.96 : x
  2. Step 2: Convert to fraction form
    647.72/893.84 = 352.96/x
  3. Step 3: Cross multiply
    647.72x = 893.84 × 352.96
  4. Step 4: Simplify right side
    647.72x = 315,489.77
  5. Step 5: Solve for x
    x = 315,489.77/647.72
  6. Step 6: Final answer
    x = 487.08

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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.