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Finding the Fourth Proportional to 651.22, 898.70 and 356.49

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Solution

The fourth proportional to 651.22, 898.70 and 356.49 is: 491.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.22 : 898.70 = 356.49 : x
  2. Step 2: Convert to fraction form
    651.22/898.70 = 356.49/x
  3. Step 3: Cross multiply
    651.22x = 898.70 × 356.49
  4. Step 4: Simplify right side
    651.22x = 320,375.78
  5. Step 5: Solve for x
    x = 320,375.78/651.22
  6. Step 6: Final answer
    x = 491.96

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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.