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Finding the Fourth Proportional to 499.98, 750.06 and 428.34

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Solution

The fourth proportional to 499.98, 750.06 and 428.34 is: 642.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.98 : 750.06 = 428.34 : x
  2. Step 2: Convert to fraction form
    499.98/750.06 = 428.34/x
  3. Step 3: Cross multiply
    499.98x = 750.06 × 428.34
  4. Step 4: Simplify right side
    499.98x = 321,280.70
  5. Step 5: Solve for x
    x = 321,280.70/499.98
  6. Step 6: Final answer
    x = 642.59

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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.