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Finding the Fourth Proportional to 577.45, 794.94 and 499.78

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Solution

The fourth proportional to 577.45, 794.94 and 499.78 is: 688.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.45 : 794.94 = 499.78 : x
  2. Step 2: Convert to fraction form
    577.45/794.94 = 499.78/x
  3. Step 3: Cross multiply
    577.45x = 794.94 × 499.78
  4. Step 4: Simplify right side
    577.45x = 397,295.11
  5. Step 5: Solve for x
    x = 397,295.11/577.45
  6. Step 6: Final answer
    x = 688.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.