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Finding the Fourth Proportional to 577.29, 866.40 and 317.43

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Solution

The fourth proportional to 577.29, 866.40 and 317.43 is: 476.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.29 : 866.40 = 317.43 : x
  2. Step 2: Convert to fraction form
    577.29/866.40 = 317.43/x
  3. Step 3: Cross multiply
    577.29x = 866.40 × 317.43
  4. Step 4: Simplify right side
    577.29x = 275,021.35
  5. Step 5: Solve for x
    x = 275,021.35/577.29
  6. Step 6: Final answer
    x = 476.40

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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.