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Finding the Fourth Proportional to 902.91, 1,245.77 and 571.48

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Solution

The fourth proportional to 902.91, 1,245.77 and 571.48 is: 788.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.91 : 1,245.77 = 571.48 : x
  2. Step 2: Convert to fraction form
    902.91/1,245.77 = 571.48/x
  3. Step 3: Cross multiply
    902.91x = 1,245.77 × 571.48
  4. Step 4: Simplify right side
    902.91x = 711,926.67
  5. Step 5: Solve for x
    x = 711,926.67/902.91
  6. Step 6: Final answer
    x = 788.48

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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.