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Finding the Fourth Proportional to 302.63, 417.84 and 215.56

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Solution

The fourth proportional to 302.63, 417.84 and 215.56 is: 297.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.63 : 417.84 = 215.56 : x
  2. Step 2: Convert to fraction form
    302.63/417.84 = 215.56/x
  3. Step 3: Cross multiply
    302.63x = 417.84 × 215.56
  4. Step 4: Simplify right side
    302.63x = 90,067.50
  5. Step 5: Solve for x
    x = 90,067.50/302.63
  6. Step 6: Final answer
    x = 297.62

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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.