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Finding the Fourth Proportional to 302.35, 417.15 and 208.95

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Solution

The fourth proportional to 302.35, 417.15 and 208.95 is: 288.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.35 : 417.15 = 208.95 : x
  2. Step 2: Convert to fraction form
    302.35/417.15 = 208.95/x
  3. Step 3: Cross multiply
    302.35x = 417.15 × 208.95
  4. Step 4: Simplify right side
    302.35x = 87,161.93
  5. Step 5: Solve for x
    x = 87,161.93/302.35
  6. Step 6: Final answer
    x = 288.28

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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.