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Finding the Fourth Proportional to 620.87, 931.94 and 606.92

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Solution

The fourth proportional to 620.87, 931.94 and 606.92 is: 911.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.87 : 931.94 = 606.92 : x
  2. Step 2: Convert to fraction form
    620.87/931.94 = 606.92/x
  3. Step 3: Cross multiply
    620.87x = 931.94 × 606.92
  4. Step 4: Simplify right side
    620.87x = 565,612.79
  5. Step 5: Solve for x
    x = 565,612.79/620.87
  6. Step 6: Final answer
    x = 911.01

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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.