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Finding the Fourth Proportional to 608.50, 840.45 and 411.67

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Solution

The fourth proportional to 608.50, 840.45 and 411.67 is: 568.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.50 : 840.45 = 411.67 : x
  2. Step 2: Convert to fraction form
    608.50/840.45 = 411.67/x
  3. Step 3: Cross multiply
    608.50x = 840.45 × 411.67
  4. Step 4: Simplify right side
    608.50x = 345,988.05
  5. Step 5: Solve for x
    x = 345,988.05/608.50
  6. Step 6: Final answer
    x = 568.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.