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Finding the Fourth Proportional to 517, 713.55 and 330.54

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Solution

The fourth proportional to 517, 713.55 and 330.54 is: 456.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    517 : 713.55 = 330.54 : x
  2. Step 2: Convert to fraction form
    517/713.55 = 330.54/x
  3. Step 3: Cross multiply
    517x = 713.55 × 330.54
  4. Step 4: Simplify right side
    517x = 235,856.82
  5. Step 5: Solve for x
    x = 235,856.82/517
  6. Step 6: Final answer
    x = 456.20

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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.