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Finding the Fourth Proportional to 3,218.67, 4,827.96 and 910.17

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Solution

The fourth proportional to 3,218.67, 4,827.96 and 910.17 is: 1,365.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.67 : 4,827.96 = 910.17 : x
  2. Step 2: Convert to fraction form
    3,218.67/4,827.96 = 910.17/x
  3. Step 3: Cross multiply
    3,218.67x = 4,827.96 × 910.17
  4. Step 4: Simplify right side
    3,218.67x = 4,394,264.35
  5. Step 5: Solve for x
    x = 4,394,264.35/3,218.67
  6. Step 6: Final answer
    x = 1,365.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.