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Finding the Fourth Proportional to 471.60, 707.16 and 255

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Solution

The fourth proportional to 471.60, 707.16 and 255 is: 382.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.60 : 707.16 = 255 : x
  2. Step 2: Convert to fraction form
    471.60/707.16 = 255/x
  3. Step 3: Cross multiply
    471.60x = 707.16 × 255
  4. Step 4: Simplify right side
    471.60x = 180,325.80
  5. Step 5: Solve for x
    x = 180,325.80/471.60
  6. Step 6: Final answer
    x = 382.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.