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Finding the Fourth Proportional to 608.60, 913.84 and 487.92

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Solution

The fourth proportional to 608.60, 913.84 and 487.92 is: 732.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.60 : 913.84 = 487.92 : x
  2. Step 2: Convert to fraction form
    608.60/913.84 = 487.92/x
  3. Step 3: Cross multiply
    608.60x = 913.84 × 487.92
  4. Step 4: Simplify right side
    608.60x = 445,880.81
  5. Step 5: Solve for x
    x = 445,880.81/608.60
  6. Step 6: Final answer
    x = 732.63

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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.