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Finding the Fourth Proportional to 571.45, 857.45 and 328.18

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Solution

The fourth proportional to 571.45, 857.45 and 328.18 is: 492.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.45 : 857.45 = 328.18 : x
  2. Step 2: Convert to fraction form
    571.45/857.45 = 328.18/x
  3. Step 3: Cross multiply
    571.45x = 857.45 × 328.18
  4. Step 4: Simplify right side
    571.45x = 281,397.94
  5. Step 5: Solve for x
    x = 281,397.94/571.45
  6. Step 6: Final answer
    x = 492.43

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Double scale
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1.5x scale

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.