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Finding the Fourth Proportional to 607.10, 910.78 and 217.15

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Solution

The fourth proportional to 607.10, 910.78 and 217.15 is: 325.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.10 : 910.78 = 217.15 : x
  2. Step 2: Convert to fraction form
    607.10/910.78 = 217.15/x
  3. Step 3: Cross multiply
    607.10x = 910.78 × 217.15
  4. Step 4: Simplify right side
    607.10x = 197,773.06
  5. Step 5: Solve for x
    x = 197,773.06/607.10
  6. Step 6: Final answer
    x = 325.77

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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.