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Finding the Fourth Proportional to 607.76, 911 and 436.24

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Solution

The fourth proportional to 607.76, 911 and 436.24 is: 653.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.76 : 911 = 436.24 : x
  2. Step 2: Convert to fraction form
    607.76/911 = 436.24/x
  3. Step 3: Cross multiply
    607.76x = 911 × 436.24
  4. Step 4: Simplify right side
    607.76x = 397,414.64
  5. Step 5: Solve for x
    x = 397,414.64/607.76
  6. Step 6: Final answer
    x = 653.90

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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.