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Finding the Fourth Proportional to 611.52, 917.28 and 474.23

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Solution

The fourth proportional to 611.52, 917.28 and 474.23 is: 711.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.52 : 917.28 = 474.23 : x
  2. Step 2: Convert to fraction form
    611.52/917.28 = 474.23/x
  3. Step 3: Cross multiply
    611.52x = 917.28 × 474.23
  4. Step 4: Simplify right side
    611.52x = 434,997.11
  5. Step 5: Solve for x
    x = 434,997.11/611.52
  6. Step 6: Final answer
    x = 711.34

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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.