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Finding the Fourth Proportional to 357.26, 535.36 and 279.88

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Solution

The fourth proportional to 357.26, 535.36 and 279.88 is: 419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.26 : 535.36 = 279.88 : x
  2. Step 2: Convert to fraction form
    357.26/535.36 = 279.88/x
  3. Step 3: Cross multiply
    357.26x = 535.36 × 279.88
  4. Step 4: Simplify right side
    357.26x = 149,836.55
  5. Step 5: Solve for x
    x = 149,836.55/357.26
  6. Step 6: Final answer
    x = 419.40

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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.