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Finding the Fourth Proportional to 450.92, 620.70 and 392.60

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Solution

The fourth proportional to 450.92, 620.70 and 392.60 is: 540.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.92 : 620.70 = 392.60 : x
  2. Step 2: Convert to fraction form
    450.92/620.70 = 392.60/x
  3. Step 3: Cross multiply
    450.92x = 620.70 × 392.60
  4. Step 4: Simplify right side
    450.92x = 243,686.82
  5. Step 5: Solve for x
    x = 243,686.82/450.92
  6. Step 6: Final answer
    x = 540.42

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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.