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Finding the Fourth Proportional to 647.09, 892.97 and 352.35

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Solution

The fourth proportional to 647.09, 892.97 and 352.35 is: 486.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.09 : 892.97 = 352.35 : x
  2. Step 2: Convert to fraction form
    647.09/892.97 = 352.35/x
  3. Step 3: Cross multiply
    647.09x = 892.97 × 352.35
  4. Step 4: Simplify right side
    647.09x = 314,639.52
  5. Step 5: Solve for x
    x = 314,639.52/647.09
  6. Step 6: Final answer
    x = 486.24

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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.