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Finding the Fourth Proportional to 577.60, 797.07 and 315.61

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Solution

The fourth proportional to 577.60, 797.07 and 315.61 is: 435.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.60 : 797.07 = 315.61 : x
  2. Step 2: Convert to fraction form
    577.60/797.07 = 315.61/x
  3. Step 3: Cross multiply
    577.60x = 797.07 × 315.61
  4. Step 4: Simplify right side
    577.60x = 251,563.26
  5. Step 5: Solve for x
    x = 251,563.26/577.60
  6. Step 6: Final answer
    x = 435.53

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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.