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Finding the Fourth Proportional to 620.44, 931.32 and 346.68

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Solution

The fourth proportional to 620.44, 931.32 and 346.68 is: 520.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.44 : 931.32 = 346.68 : x
  2. Step 2: Convert to fraction form
    620.44/931.32 = 346.68/x
  3. Step 3: Cross multiply
    620.44x = 931.32 × 346.68
  4. Step 4: Simplify right side
    620.44x = 322,870.02
  5. Step 5: Solve for x
    x = 322,870.02/620.44
  6. Step 6: Final answer
    x = 520.39

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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.