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Finding the Fourth Proportional to 577.12, 796.40 and 315.12

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Solution

The fourth proportional to 577.12, 796.40 and 315.12 is: 434.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.12 : 796.40 = 315.12 : x
  2. Step 2: Convert to fraction form
    577.12/796.40 = 315.12/x
  3. Step 3: Cross multiply
    577.12x = 796.40 × 315.12
  4. Step 4: Simplify right side
    577.12x = 250,961.57
  5. Step 5: Solve for x
    x = 250,961.57/577.12
  6. Step 6: Final answer
    x = 434.85

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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.