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Finding the Fourth Proportional to 622.90, 859.65 and 361.07

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Solution

The fourth proportional to 622.90, 859.65 and 361.07 is: 498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.90 : 859.65 = 361.07 : x
  2. Step 2: Convert to fraction form
    622.90/859.65 = 361.07/x
  3. Step 3: Cross multiply
    622.90x = 859.65 × 361.07
  4. Step 4: Simplify right side
    622.90x = 310,393.83
  5. Step 5: Solve for x
    x = 310,393.83/622.90
  6. Step 6: Final answer
    x = 498.30

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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.