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Finding the Fourth Proportional to 619.96, 853.02 and 536.80

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Solution

The fourth proportional to 619.96, 853.02 and 536.80 is: 738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.96 : 853.02 = 536.80 : x
  2. Step 2: Convert to fraction form
    619.96/853.02 = 536.80/x
  3. Step 3: Cross multiply
    619.96x = 853.02 × 536.80
  4. Step 4: Simplify right side
    619.96x = 457,901.14
  5. Step 5: Solve for x
    x = 457,901.14/619.96
  6. Step 6: Final answer
    x = 738.60

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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.