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Finding the Fourth Proportional to 423.28, 633.43 and 394.93

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Solution

The fourth proportional to 423.28, 633.43 and 394.93 is: 591.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.28 : 633.43 = 394.93 : x
  2. Step 2: Convert to fraction form
    423.28/633.43 = 394.93/x
  3. Step 3: Cross multiply
    423.28x = 633.43 × 394.93
  4. Step 4: Simplify right side
    423.28x = 250,160.51
  5. Step 5: Solve for x
    x = 250,160.51/423.28
  6. Step 6: Final answer
    x = 591.00

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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.