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Finding the Fourth Proportional to 622.03, 859.05 and 389.29

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Solution

The fourth proportional to 622.03, 859.05 and 389.29 is: 537.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.03 : 859.05 = 389.29 : x
  2. Step 2: Convert to fraction form
    622.03/859.05 = 389.29/x
  3. Step 3: Cross multiply
    622.03x = 859.05 × 389.29
  4. Step 4: Simplify right side
    622.03x = 334,415.28
  5. Step 5: Solve for x
    x = 334,415.28/622.03
  6. Step 6: Final answer
    x = 537.62

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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.