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Finding the Fourth Proportional to 350.28, 521.40 and 345.08

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Solution

The fourth proportional to 350.28, 521.40 and 345.08 is: 513.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.28 : 521.40 = 345.08 : x
  2. Step 2: Convert to fraction form
    350.28/521.40 = 345.08/x
  3. Step 3: Cross multiply
    350.28x = 521.40 × 345.08
  4. Step 4: Simplify right side
    350.28x = 179,922.11
  5. Step 5: Solve for x
    x = 179,922.11/350.28
  6. Step 6: Final answer
    x = 513.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.