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Finding the Fourth Proportional to 302.31, 417.51 and 208.89

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Solution

The fourth proportional to 302.31, 417.51 and 208.89 is: 288.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.31 : 417.51 = 208.89 : x
  2. Step 2: Convert to fraction form
    302.31/417.51 = 208.89/x
  3. Step 3: Cross multiply
    302.31x = 417.51 × 208.89
  4. Step 4: Simplify right side
    302.31x = 87,213.66
  5. Step 5: Solve for x
    x = 87,213.66/302.31
  6. Step 6: Final answer
    x = 288.49

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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.