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Finding the Fourth Proportional to 607.57, 911.62 and 318.94

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Solution

The fourth proportional to 607.57, 911.62 and 318.94 is: 478.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.57 : 911.62 = 318.94 : x
  2. Step 2: Convert to fraction form
    607.57/911.62 = 318.94/x
  3. Step 3: Cross multiply
    607.57x = 911.62 × 318.94
  4. Step 4: Simplify right side
    607.57x = 290,750.20
  5. Step 5: Solve for x
    x = 290,750.20/607.57
  6. Step 6: Final answer
    x = 478.55

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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.