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Finding the Fourth Proportional to 302.46, 455.21 and 272.64

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Solution

The fourth proportional to 302.46, 455.21 and 272.64 is: 410.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.46 : 455.21 = 272.64 : x
  2. Step 2: Convert to fraction form
    302.46/455.21 = 272.64/x
  3. Step 3: Cross multiply
    302.46x = 455.21 × 272.64
  4. Step 4: Simplify right side
    302.46x = 124,108.45
  5. Step 5: Solve for x
    x = 124,108.45/302.46
  6. Step 6: Final answer
    x = 410.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.