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Finding the Fourth Proportional to 302.16, 416.30 and 208.74

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Solution

The fourth proportional to 302.16, 416.30 and 208.74 is: 287.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.16 : 416.30 = 208.74 : x
  2. Step 2: Convert to fraction form
    302.16/416.30 = 208.74/x
  3. Step 3: Cross multiply
    302.16x = 416.30 × 208.74
  4. Step 4: Simplify right side
    302.16x = 86,897.42
  5. Step 5: Solve for x
    x = 86,897.42/302.16
  6. Step 6: Final answer
    x = 287.59

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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.