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Finding the Fourth Proportional to 454.12, 681.06 and 210.76

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Solution

The fourth proportional to 454.12, 681.06 and 210.76 is: 316.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.12 : 681.06 = 210.76 : x
  2. Step 2: Convert to fraction form
    454.12/681.06 = 210.76/x
  3. Step 3: Cross multiply
    454.12x = 681.06 × 210.76
  4. Step 4: Simplify right side
    454.12x = 143,540.21
  5. Step 5: Solve for x
    x = 143,540.21/454.12
  6. Step 6: Final answer
    x = 316.08

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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.