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Finding the Fourth Proportional to 572.29, 789.79 and 336.40

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Solution

The fourth proportional to 572.29, 789.79 and 336.40 is: 464.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.29 : 789.79 = 336.40 : x
  2. Step 2: Convert to fraction form
    572.29/789.79 = 336.40/x
  3. Step 3: Cross multiply
    572.29x = 789.79 × 336.40
  4. Step 4: Simplify right side
    572.29x = 265,685.36
  5. Step 5: Solve for x
    x = 265,685.36/572.29
  6. Step 6: Final answer
    x = 464.25

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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.