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Finding the Fourth Proportional to 357.84, 535.68 and 261

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Solution

The fourth proportional to 357.84, 535.68 and 261 is: 390.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.84 : 535.68 = 261 : x
  2. Step 2: Convert to fraction form
    357.84/535.68 = 261/x
  3. Step 3: Cross multiply
    357.84x = 535.68 × 261
  4. Step 4: Simplify right side
    357.84x = 139,812.48
  5. Step 5: Solve for x
    x = 139,812.48/357.84
  6. Step 6: Final answer
    x = 390.71

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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.