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Finding the Fourth Proportional to 451.51, 622.60 and 340.79

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Solution

The fourth proportional to 451.51, 622.60 and 340.79 is: 469.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.51 : 622.60 = 340.79 : x
  2. Step 2: Convert to fraction form
    451.51/622.60 = 340.79/x
  3. Step 3: Cross multiply
    451.51x = 622.60 × 340.79
  4. Step 4: Simplify right side
    451.51x = 212,171.89
  5. Step 5: Solve for x
    x = 212,171.89/451.51
  6. Step 6: Final answer
    x = 469.92

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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.