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Finding the Fourth Proportional to 607.65, 911.60 and 217.77

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Solution

The fourth proportional to 607.65, 911.60 and 217.77 is: 326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.65 : 911.60 = 217.77 : x
  2. Step 2: Convert to fraction form
    607.65/911.60 = 217.77/x
  3. Step 3: Cross multiply
    607.65x = 911.60 × 217.77
  4. Step 4: Simplify right side
    607.65x = 198,518.04
  5. Step 5: Solve for x
    x = 198,518.04/607.65
  6. Step 6: Final answer
    x = 326.70

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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.