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Finding the Fourth Proportional to 577.51, 866.09 and 212.35

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Solution

The fourth proportional to 577.51, 866.09 and 212.35 is: 318.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.51 : 866.09 = 212.35 : x
  2. Step 2: Convert to fraction form
    577.51/866.09 = 212.35/x
  3. Step 3: Cross multiply
    577.51x = 866.09 × 212.35
  4. Step 4: Simplify right side
    577.51x = 183,913.15
  5. Step 5: Solve for x
    x = 183,913.15/577.51
  6. Step 6: Final answer
    x = 318.46

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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.