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Finding the Fourth Proportional to 622.68, 934.32 and 257.58

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Solution

The fourth proportional to 622.68, 934.32 and 257.58 is: 386.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.68 : 934.32 = 257.58 : x
  2. Step 2: Convert to fraction form
    622.68/934.32 = 257.58/x
  3. Step 3: Cross multiply
    622.68x = 934.32 × 257.58
  4. Step 4: Simplify right side
    622.68x = 240,662.15
  5. Step 5: Solve for x
    x = 240,662.15/622.68
  6. Step 6: Final answer
    x = 386.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.