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Finding the Fourth Proportional to 608.92, 840.49 and 539.21

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Solution

The fourth proportional to 608.92, 840.49 and 539.21 is: 744.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.92 : 840.49 = 539.21 : x
  2. Step 2: Convert to fraction form
    608.92/840.49 = 539.21/x
  3. Step 3: Cross multiply
    608.92x = 840.49 × 539.21
  4. Step 4: Simplify right side
    608.92x = 453,200.61
  5. Step 5: Solve for x
    x = 453,200.61/608.92
  6. Step 6: Final answer
    x = 744.27

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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.