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Finding the Fourth Proportional to 577.80, 866.85 and 490.23

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Solution

The fourth proportional to 577.80, 866.85 and 490.23 is: 735.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.80 : 866.85 = 490.23 : x
  2. Step 2: Convert to fraction form
    577.80/866.85 = 490.23/x
  3. Step 3: Cross multiply
    577.80x = 866.85 × 490.23
  4. Step 4: Simplify right side
    577.80x = 424,955.88
  5. Step 5: Solve for x
    x = 424,955.88/577.80
  6. Step 6: Final answer
    x = 735.47

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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.