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Finding the Fourth Proportional to 864.22, 1,192.62 and 471.22

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Solution

The fourth proportional to 864.22, 1,192.62 and 471.22 is: 650.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.22 : 1,192.62 = 471.22 : x
  2. Step 2: Convert to fraction form
    864.22/1,192.62 = 471.22/x
  3. Step 3: Cross multiply
    864.22x = 1,192.62 × 471.22
  4. Step 4: Simplify right side
    864.22x = 561,986.40
  5. Step 5: Solve for x
    x = 561,986.40/864.22
  6. Step 6: Final answer
    x = 650.28

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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.