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Finding the Fourth Proportional to 454.15, 681.29 and 210.74

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Solution

The fourth proportional to 454.15, 681.29 and 210.74 is: 316.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.15 : 681.29 = 210.74 : x
  2. Step 2: Convert to fraction form
    454.15/681.29 = 210.74/x
  3. Step 3: Cross multiply
    454.15x = 681.29 × 210.74
  4. Step 4: Simplify right side
    454.15x = 143,575.05
  5. Step 5: Solve for x
    x = 143,575.05/454.15
  6. Step 6: Final answer
    x = 316.14

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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.