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Finding the Fourth Proportional to 411.42, 619.57 and 357.96

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Solution

The fourth proportional to 411.42, 619.57 and 357.96 is: 539.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.42 : 619.57 = 357.96 : x
  2. Step 2: Convert to fraction form
    411.42/619.57 = 357.96/x
  3. Step 3: Cross multiply
    411.42x = 619.57 × 357.96
  4. Step 4: Simplify right side
    411.42x = 221,780.38
  5. Step 5: Solve for x
    x = 221,780.38/411.42
  6. Step 6: Final answer
    x = 539.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.