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Finding the Fourth Proportional to 571.80, 789.11 and 323.13

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Solution

The fourth proportional to 571.80, 789.11 and 323.13 is: 445.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.80 : 789.11 = 323.13 : x
  2. Step 2: Convert to fraction form
    571.80/789.11 = 323.13/x
  3. Step 3: Cross multiply
    571.80x = 789.11 × 323.13
  4. Step 4: Simplify right side
    571.80x = 254,985.11
  5. Step 5: Solve for x
    x = 254,985.11/571.80
  6. Step 6: Final answer
    x = 445.93

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1.5x scale

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.