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Finding the Fourth Proportional to 622.14, 931.51 and 439.08

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Solution

The fourth proportional to 622.14, 931.51 and 439.08 is: 657.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.14 : 931.51 = 439.08 : x
  2. Step 2: Convert to fraction form
    622.14/931.51 = 439.08/x
  3. Step 3: Cross multiply
    622.14x = 931.51 × 439.08
  4. Step 4: Simplify right side
    622.14x = 409,007.41
  5. Step 5: Solve for x
    x = 409,007.41/622.14
  6. Step 6: Final answer
    x = 657.42

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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.