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Finding the Fourth Proportional to 571.87, 789.65 and 440.65

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Solution

The fourth proportional to 571.87, 789.65 and 440.65 is: 608.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.87 : 789.65 = 440.65 : x
  2. Step 2: Convert to fraction form
    571.87/789.65 = 440.65/x
  3. Step 3: Cross multiply
    571.87x = 789.65 × 440.65
  4. Step 4: Simplify right side
    571.87x = 347,959.27
  5. Step 5: Solve for x
    x = 347,959.27/571.87
  6. Step 6: Final answer
    x = 608.46

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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.