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Finding the Fourth Proportional to 528.50, 789.04 and 451.50

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Solution

The fourth proportional to 528.50, 789.04 and 451.50 is: 674.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.50 : 789.04 = 451.50 : x
  2. Step 2: Convert to fraction form
    528.50/789.04 = 451.50/x
  3. Step 3: Cross multiply
    528.50x = 789.04 × 451.50
  4. Step 4: Simplify right side
    528.50x = 356,251.56
  5. Step 5: Solve for x
    x = 356,251.56/528.50
  6. Step 6: Final answer
    x = 674.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.