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Finding the Fourth Proportional to 357.24, 535.86 and 243

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Solution

The fourth proportional to 357.24, 535.86 and 243 is: 364.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.24 : 535.86 = 243 : x
  2. Step 2: Convert to fraction form
    357.24/535.86 = 243/x
  3. Step 3: Cross multiply
    357.24x = 535.86 × 243
  4. Step 4: Simplify right side
    357.24x = 130,213.98
  5. Step 5: Solve for x
    x = 130,213.98/357.24
  6. Step 6: Final answer
    x = 364.50

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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.