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Finding the Fourth Proportional to 577.64, 866.80 and 212.68

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Solution

The fourth proportional to 577.64, 866.80 and 212.68 is: 319.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.64 : 866.80 = 212.68 : x
  2. Step 2: Convert to fraction form
    577.64/866.80 = 212.68/x
  3. Step 3: Cross multiply
    577.64x = 866.80 × 212.68
  4. Step 4: Simplify right side
    577.64x = 184,351.31
  5. Step 5: Solve for x
    x = 184,351.31/577.64
  6. Step 6: Final answer
    x = 319.15

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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.