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Finding the Fourth Proportional to 622.72, 859.02 and 386.52

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Solution

The fourth proportional to 622.72, 859.02 and 386.52 is: 533.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.72 : 859.02 = 386.52 : x
  2. Step 2: Convert to fraction form
    622.72/859.02 = 386.52/x
  3. Step 3: Cross multiply
    622.72x = 859.02 × 386.52
  4. Step 4: Simplify right side
    622.72x = 332,028.41
  5. Step 5: Solve for x
    x = 332,028.41/622.72
  6. Step 6: Final answer
    x = 533.19

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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.