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Finding the Fourth Proportional to 688.83, 950.64 and 394.02

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Solution

The fourth proportional to 688.83, 950.64 and 394.02 is: 543.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.83 : 950.64 = 394.02 : x
  2. Step 2: Convert to fraction form
    688.83/950.64 = 394.02/x
  3. Step 3: Cross multiply
    688.83x = 950.64 × 394.02
  4. Step 4: Simplify right side
    688.83x = 374,571.17
  5. Step 5: Solve for x
    x = 374,571.17/688.83
  6. Step 6: Final answer
    x = 543.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.