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Finding the Fourth Proportional to 571.79, 857.55 and 328.19

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Solution

The fourth proportional to 571.79, 857.55 and 328.19 is: 492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.79 : 857.55 = 328.19 : x
  2. Step 2: Convert to fraction form
    571.79/857.55 = 328.19/x
  3. Step 3: Cross multiply
    571.79x = 857.55 × 328.19
  4. Step 4: Simplify right side
    571.79x = 281,439.33
  5. Step 5: Solve for x
    x = 281,439.33/571.79
  6. Step 6: Final answer
    x = 492.21

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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.