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Finding the Fourth Proportional to 471.87, 707.81 and 380.12

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Solution

The fourth proportional to 471.87, 707.81 and 380.12 is: 570.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.87 : 707.81 = 380.12 : x
  2. Step 2: Convert to fraction form
    471.87/707.81 = 380.12/x
  3. Step 3: Cross multiply
    471.87x = 707.81 × 380.12
  4. Step 4: Simplify right side
    471.87x = 269,047.30
  5. Step 5: Solve for x
    x = 269,047.30/471.87
  6. Step 6: Final answer
    x = 570.17

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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.