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Finding the Fourth Proportional to 577.85, 797.42 and 315.86

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Solution

The fourth proportional to 577.85, 797.42 and 315.86 is: 435.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.85 : 797.42 = 315.86 : x
  2. Step 2: Convert to fraction form
    577.85/797.42 = 315.86/x
  3. Step 3: Cross multiply
    577.85x = 797.42 × 315.86
  4. Step 4: Simplify right side
    577.85x = 251,873.08
  5. Step 5: Solve for x
    x = 251,873.08/577.85
  6. Step 6: Final answer
    x = 435.88

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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.