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Finding the Fourth Proportional to 651.22, 898.70 and 356.48

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Solution

The fourth proportional to 651.22, 898.70 and 356.48 is: 491.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.22 : 898.70 = 356.48 : x
  2. Step 2: Convert to fraction form
    651.22/898.70 = 356.48/x
  3. Step 3: Cross multiply
    651.22x = 898.70 × 356.48
  4. Step 4: Simplify right side
    651.22x = 320,370.73
  5. Step 5: Solve for x
    x = 320,370.73/651.22
  6. Step 6: Final answer
    x = 491.95

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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.