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Finding the Fourth Proportional to 577.32, 866.10 and 212.11

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Solution

The fourth proportional to 577.32, 866.10 and 212.11 is: 318.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.32 : 866.10 = 212.11 : x
  2. Step 2: Convert to fraction form
    577.32/866.10 = 212.11/x
  3. Step 3: Cross multiply
    577.32x = 866.10 × 212.11
  4. Step 4: Simplify right side
    577.32x = 183,708.47
  5. Step 5: Solve for x
    x = 183,708.47/577.32
  6. Step 6: Final answer
    x = 318.21

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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.