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Finding the Fourth Proportional to 651.44, 898.97 and 399.47

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Solution

The fourth proportional to 651.44, 898.97 and 399.47 is: 551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.44 : 898.97 = 399.47 : x
  2. Step 2: Convert to fraction form
    651.44/898.97 = 399.47/x
  3. Step 3: Cross multiply
    651.44x = 898.97 × 399.47
  4. Step 4: Simplify right side
    651.44x = 359,105.05
  5. Step 5: Solve for x
    x = 359,105.05/651.44
  6. Step 6: Final answer
    x = 551.25

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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.