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Finding the Fourth Proportional to 295.28, 407.40 and 208.16

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Solution

The fourth proportional to 295.28, 407.40 and 208.16 is: 287.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.28 : 407.40 = 208.16 : x
  2. Step 2: Convert to fraction form
    295.28/407.40 = 208.16/x
  3. Step 3: Cross multiply
    295.28x = 407.40 × 208.16
  4. Step 4: Simplify right side
    295.28x = 84,804.38
  5. Step 5: Solve for x
    x = 84,804.38/295.28
  6. Step 6: Final answer
    x = 287.20

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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.