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Finding the Fourth Proportional to 577.50, 796.95 and 315.51

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Solution

The fourth proportional to 577.50, 796.95 and 315.51 is: 435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.50 : 796.95 = 315.51 : x
  2. Step 2: Convert to fraction form
    577.50/796.95 = 315.51/x
  3. Step 3: Cross multiply
    577.50x = 796.95 × 315.51
  4. Step 4: Simplify right side
    577.50x = 251,445.69
  5. Step 5: Solve for x
    x = 251,445.69/577.50
  6. Step 6: Final answer
    x = 435.40

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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.