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Finding the Fourth Proportional to 622.04, 931.42 and 389.96

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Solution

The fourth proportional to 622.04, 931.42 and 389.96 is: 583.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.04 : 931.42 = 389.96 : x
  2. Step 2: Convert to fraction form
    622.04/931.42 = 389.96/x
  3. Step 3: Cross multiply
    622.04x = 931.42 × 389.96
  4. Step 4: Simplify right side
    622.04x = 363,216.54
  5. Step 5: Solve for x
    x = 363,216.54/622.04
  6. Step 6: Final answer
    x = 583.91

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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.