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Finding the Fourth Proportional to 864.35, 1,192.79 and 471.37

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Solution

The fourth proportional to 864.35, 1,192.79 and 471.37 is: 650.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.35 : 1,192.79 = 471.37 : x
  2. Step 2: Convert to fraction form
    864.35/1,192.79 = 471.37/x
  3. Step 3: Cross multiply
    864.35x = 1,192.79 × 471.37
  4. Step 4: Simplify right side
    864.35x = 562,240.08
  5. Step 5: Solve for x
    x = 562,240.08/864.35
  6. Step 6: Final answer
    x = 650.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.