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Finding the Fourth Proportional to 647.21, 893.16 and 352.47

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Solution

The fourth proportional to 647.21, 893.16 and 352.47 is: 486.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.21 : 893.16 = 352.47 : x
  2. Step 2: Convert to fraction form
    647.21/893.16 = 352.47/x
  3. Step 3: Cross multiply
    647.21x = 893.16 × 352.47
  4. Step 4: Simplify right side
    647.21x = 314,813.46
  5. Step 5: Solve for x
    x = 314,813.46/647.21
  6. Step 6: Final answer
    x = 486.41

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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.