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Finding the Fourth Proportional to 453.98, 680.75 and 210.57

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Solution

The fourth proportional to 453.98, 680.75 and 210.57 is: 315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.98 : 680.75 = 210.57 : x
  2. Step 2: Convert to fraction form
    453.98/680.75 = 210.57/x
  3. Step 3: Cross multiply
    453.98x = 680.75 × 210.57
  4. Step 4: Simplify right side
    453.98x = 143,344.47
  5. Step 5: Solve for x
    x = 143,344.47/453.98
  6. Step 6: Final answer
    x = 315.75

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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.