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Finding the Fourth Proportional to 454.60, 681.36 and 272.08

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Solution

The fourth proportional to 454.60, 681.36 and 272.08 is: 407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.60 : 681.36 = 272.08 : x
  2. Step 2: Convert to fraction form
    454.60/681.36 = 272.08/x
  3. Step 3: Cross multiply
    454.60x = 681.36 × 272.08
  4. Step 4: Simplify right side
    454.60x = 185,384.43
  5. Step 5: Solve for x
    x = 185,384.43/454.60
  6. Step 6: Final answer
    x = 407.80

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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.