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Finding the Fourth Proportional to 613.93, 921.29 and 556.27

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Solution

The fourth proportional to 613.93, 921.29 and 556.27 is: 834.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.93 : 921.29 = 556.27 : x
  2. Step 2: Convert to fraction form
    613.93/921.29 = 556.27/x
  3. Step 3: Cross multiply
    613.93x = 921.29 × 556.27
  4. Step 4: Simplify right side
    613.93x = 512,485.99
  5. Step 5: Solve for x
    x = 512,485.99/613.93
  6. Step 6: Final answer
    x = 834.76

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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.