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Finding the Fourth Proportional to 608.07, 910.28 and 391.20

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Solution

The fourth proportional to 608.07, 910.28 and 391.20 is: 585.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.07 : 910.28 = 391.20 : x
  2. Step 2: Convert to fraction form
    608.07/910.28 = 391.20/x
  3. Step 3: Cross multiply
    608.07x = 910.28 × 391.20
  4. Step 4: Simplify right side
    608.07x = 356,099.58
  5. Step 5: Solve for x
    x = 356,099.58/608.07
  6. Step 6: Final answer
    x = 585.62

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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.