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Finding the Fourth Proportional to 608.91, 913.01 and 478.59

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Solution

The fourth proportional to 608.91, 913.01 and 478.59 is: 717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.91 : 913.01 = 478.59 : x
  2. Step 2: Convert to fraction form
    608.91/913.01 = 478.59/x
  3. Step 3: Cross multiply
    608.91x = 913.01 × 478.59
  4. Step 4: Simplify right side
    608.91x = 436,957.46
  5. Step 5: Solve for x
    x = 436,957.46/608.91
  6. Step 6: Final answer
    x = 717.61

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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.