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Finding the Fourth Proportional to 469.85, 647.96 and 352.11

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Solution

The fourth proportional to 469.85, 647.96 and 352.11 is: 485.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.85 : 647.96 = 352.11 : x
  2. Step 2: Convert to fraction form
    469.85/647.96 = 352.11/x
  3. Step 3: Cross multiply
    469.85x = 647.96 × 352.11
  4. Step 4: Simplify right side
    469.85x = 228,151.44
  5. Step 5: Solve for x
    x = 228,151.44/469.85
  6. Step 6: Final answer
    x = 485.58

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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.