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Finding the Fourth Proportional to 621.45, 927.09 and 577.26

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Solution

The fourth proportional to 621.45, 927.09 and 577.26 is: 861.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.45 : 927.09 = 577.26 : x
  2. Step 2: Convert to fraction form
    621.45/927.09 = 577.26/x
  3. Step 3: Cross multiply
    621.45x = 927.09 × 577.26
  4. Step 4: Simplify right side
    621.45x = 535,167.34
  5. Step 5: Solve for x
    x = 535,167.34/621.45
  6. Step 6: Final answer
    x = 861.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.