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Finding the Fourth Proportional to 471.36, 708.18 and 385.24

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Solution

The fourth proportional to 471.36, 708.18 and 385.24 is: 578.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.36 : 708.18 = 385.24 : x
  2. Step 2: Convert to fraction form
    471.36/708.18 = 385.24/x
  3. Step 3: Cross multiply
    471.36x = 708.18 × 385.24
  4. Step 4: Simplify right side
    471.36x = 272,821.99
  5. Step 5: Solve for x
    x = 272,821.99/471.36
  6. Step 6: Final answer
    x = 578.80

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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.