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Finding the Fourth Proportional to 302.66, 456.20 and 276.74

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Solution

The fourth proportional to 302.66, 456.20 and 276.74 is: 417.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.66 : 456.20 = 276.74 : x
  2. Step 2: Convert to fraction form
    302.66/456.20 = 276.74/x
  3. Step 3: Cross multiply
    302.66x = 456.20 × 276.74
  4. Step 4: Simplify right side
    302.66x = 126,245.12
  5. Step 5: Solve for x
    x = 126,245.12/302.66
  6. Step 6: Final answer
    x = 417.13

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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.