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Finding the Fourth Proportional to 302.64, 417.44 and 215.12

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Solution

The fourth proportional to 302.64, 417.44 and 215.12 is: 296.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.64 : 417.44 = 215.12 : x
  2. Step 2: Convert to fraction form
    302.64/417.44 = 215.12/x
  3. Step 3: Cross multiply
    302.64x = 417.44 × 215.12
  4. Step 4: Simplify right side
    302.64x = 89,799.69
  5. Step 5: Solve for x
    x = 89,799.69/302.64
  6. Step 6: Final answer
    x = 296.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.