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Finding the Fourth Proportional to 645.88, 968.82 and 547.45

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Solution

The fourth proportional to 645.88, 968.82 and 547.45 is: 821.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.88 : 968.82 = 547.45 : x
  2. Step 2: Convert to fraction form
    645.88/968.82 = 547.45/x
  3. Step 3: Cross multiply
    645.88x = 968.82 × 547.45
  4. Step 4: Simplify right side
    645.88x = 530,380.51
  5. Step 5: Solve for x
    x = 530,380.51/645.88
  6. Step 6: Final answer
    x = 821.18

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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.