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Finding the Fourth Proportional to 611.37, 917.43 and 264.64

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Solution

The fourth proportional to 611.37, 917.43 and 264.64 is: 397.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.37 : 917.43 = 264.64 : x
  2. Step 2: Convert to fraction form
    611.37/917.43 = 264.64/x
  3. Step 3: Cross multiply
    611.37x = 917.43 × 264.64
  4. Step 4: Simplify right side
    611.37x = 242,788.68
  5. Step 5: Solve for x
    x = 242,788.68/611.37
  6. Step 6: Final answer
    x = 397.12

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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.