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Finding the Fourth Proportional to 571.48, 789 and 440.24

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Solution

The fourth proportional to 571.48, 789 and 440.24 is: 607.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.48 : 789 = 440.24 : x
  2. Step 2: Convert to fraction form
    571.48/789 = 440.24/x
  3. Step 3: Cross multiply
    571.48x = 789 × 440.24
  4. Step 4: Simplify right side
    571.48x = 347,349.36
  5. Step 5: Solve for x
    x = 347,349.36/571.48
  6. Step 6: Final answer
    x = 607.81

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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.