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Finding the Fourth Proportional to 450.86, 621.11 and 340.29

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Solution

The fourth proportional to 450.86, 621.11 and 340.29 is: 468.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.86 : 621.11 = 340.29 : x
  2. Step 2: Convert to fraction form
    450.86/621.11 = 340.29/x
  3. Step 3: Cross multiply
    450.86x = 621.11 × 340.29
  4. Step 4: Simplify right side
    450.86x = 211,355.82
  5. Step 5: Solve for x
    x = 211,355.82/450.86
  6. Step 6: Final answer
    x = 468.79

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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.