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Finding the Fourth Proportional to 471.36, 649.94 and 392.76

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Solution

The fourth proportional to 471.36, 649.94 and 392.76 is: 541.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.36 : 649.94 = 392.76 : x
  2. Step 2: Convert to fraction form
    471.36/649.94 = 392.76/x
  3. Step 3: Cross multiply
    471.36x = 649.94 × 392.76
  4. Step 4: Simplify right side
    471.36x = 255,270.43
  5. Step 5: Solve for x
    x = 255,270.43/471.36
  6. Step 6: Final answer
    x = 541.56

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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.