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Finding the Fourth Proportional to 571.04, 787.79 and 374.21

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Solution

The fourth proportional to 571.04, 787.79 and 374.21 is: 516.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.04 : 787.79 = 374.21 : x
  2. Step 2: Convert to fraction form
    571.04/787.79 = 374.21/x
  3. Step 3: Cross multiply
    571.04x = 787.79 × 374.21
  4. Step 4: Simplify right side
    571.04x = 294,798.90
  5. Step 5: Solve for x
    x = 294,798.90/571.04
  6. Step 6: Final answer
    x = 516.25

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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.