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Finding the Fourth Proportional to 647.22, 893.18 and 352.49

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Solution

The fourth proportional to 647.22, 893.18 and 352.49 is: 486.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.22 : 893.18 = 352.49 : x
  2. Step 2: Convert to fraction form
    647.22/893.18 = 352.49/x
  3. Step 3: Cross multiply
    647.22x = 893.18 × 352.49
  4. Step 4: Simplify right side
    647.22x = 314,838.81
  5. Step 5: Solve for x
    x = 314,838.81/647.22
  6. Step 6: Final answer
    x = 486.45

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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.