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Finding the Fourth Proportional to 853.98, 1,281 and 528.36

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Solution

The fourth proportional to 853.98, 1,281 and 528.36 is: 792.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.98 : 1,281 = 528.36 : x
  2. Step 2: Convert to fraction form
    853.98/1,281 = 528.36/x
  3. Step 3: Cross multiply
    853.98x = 1,281 × 528.36
  4. Step 4: Simplify right side
    853.98x = 676,829.16
  5. Step 5: Solve for x
    x = 676,829.16/853.98
  6. Step 6: Final answer
    x = 792.56

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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.