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Finding the Fourth Proportional to 577.55, 866.38 and 212.34

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Solution

The fourth proportional to 577.55, 866.38 and 212.34 is: 318.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.55 : 866.38 = 212.34 : x
  2. Step 2: Convert to fraction form
    577.55/866.38 = 212.34/x
  3. Step 3: Cross multiply
    577.55x = 866.38 × 212.34
  4. Step 4: Simplify right side
    577.55x = 183,967.13
  5. Step 5: Solve for x
    x = 183,967.13/577.55
  6. Step 6: Final answer
    x = 318.53

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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.