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Finding the Fourth Proportional to 295.65, 407.99 and 208.47

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Solution

The fourth proportional to 295.65, 407.99 and 208.47 is: 287.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.65 : 407.99 = 208.47 : x
  2. Step 2: Convert to fraction form
    295.65/407.99 = 208.47/x
  3. Step 3: Cross multiply
    295.65x = 407.99 × 208.47
  4. Step 4: Simplify right side
    295.65x = 85,052.63
  5. Step 5: Solve for x
    x = 85,052.63/295.65
  6. Step 6: Final answer
    x = 287.68

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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.