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Finding the Fourth Proportional to 316.36, 476.88 and 262.60

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Solution

The fourth proportional to 316.36, 476.88 and 262.60 is: 395.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.36 : 476.88 = 262.60 : x
  2. Step 2: Convert to fraction form
    316.36/476.88 = 262.60/x
  3. Step 3: Cross multiply
    316.36x = 476.88 × 262.60
  4. Step 4: Simplify right side
    316.36x = 125,227.50
  5. Step 5: Solve for x
    x = 125,227.50/316.36
  6. Step 6: Final answer
    x = 395.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.