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Finding the Fourth Proportional to 451.03, 622.45 and 340.31

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Solution

The fourth proportional to 451.03, 622.45 and 340.31 is: 469.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.03 : 622.45 = 340.31 : x
  2. Step 2: Convert to fraction form
    451.03/622.45 = 340.31/x
  3. Step 3: Cross multiply
    451.03x = 622.45 × 340.31
  4. Step 4: Simplify right side
    451.03x = 211,825.96
  5. Step 5: Solve for x
    x = 211,825.96/451.03
  6. Step 6: Final answer
    x = 469.65

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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.