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Finding the Fourth Proportional to 622.30, 859.26 and 412.96

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Solution

The fourth proportional to 622.30, 859.26 and 412.96 is: 570.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.30 : 859.26 = 412.96 : x
  2. Step 2: Convert to fraction form
    622.30/859.26 = 412.96/x
  3. Step 3: Cross multiply
    622.30x = 859.26 × 412.96
  4. Step 4: Simplify right side
    622.30x = 354,840.01
  5. Step 5: Solve for x
    x = 354,840.01/622.30
  6. Step 6: Final answer
    x = 570.21

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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.