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Finding the Fourth Proportional to 607.60, 911.40 and 433.90

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Solution

The fourth proportional to 607.60, 911.40 and 433.90 is: 650.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.60 : 911.40 = 433.90 : x
  2. Step 2: Convert to fraction form
    607.60/911.40 = 433.90/x
  3. Step 3: Cross multiply
    607.60x = 911.40 × 433.90
  4. Step 4: Simplify right side
    607.60x = 395,456.46
  5. Step 5: Solve for x
    x = 395,456.46/607.60
  6. Step 6: Final answer
    x = 650.85

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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.