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Finding the Fourth Proportional to 622.88, 859.58 and 346.88

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Solution

The fourth proportional to 622.88, 859.58 and 346.88 is: 478.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.88 : 859.58 = 346.88 : x
  2. Step 2: Convert to fraction form
    622.88/859.58 = 346.88/x
  3. Step 3: Cross multiply
    622.88x = 859.58 × 346.88
  4. Step 4: Simplify right side
    622.88x = 298,165.08
  5. Step 5: Solve for x
    x = 298,165.08/622.88
  6. Step 6: Final answer
    x = 478.69

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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.