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Finding the Fourth Proportional to 571.43, 787.75 and 492.41

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Solution

The fourth proportional to 571.43, 787.75 and 492.41 is: 678.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.43 : 787.75 = 492.41 : x
  2. Step 2: Convert to fraction form
    571.43/787.75 = 492.41/x
  3. Step 3: Cross multiply
    571.43x = 787.75 × 492.41
  4. Step 4: Simplify right side
    571.43x = 387,896.72
  5. Step 5: Solve for x
    x = 387,896.72/571.43
  6. Step 6: Final answer
    x = 678.81

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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.