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Finding the Fourth Proportional to 571.39, 788.50 and 374.90

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Solution

The fourth proportional to 571.39, 788.50 and 374.90 is: 517.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.39 : 788.50 = 374.90 : x
  2. Step 2: Convert to fraction form
    571.39/788.50 = 374.90/x
  3. Step 3: Cross multiply
    571.39x = 788.50 × 374.90
  4. Step 4: Simplify right side
    571.39x = 295,608.65
  5. Step 5: Solve for x
    x = 295,608.65/571.39
  6. Step 6: Final answer
    x = 517.35

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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.