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Finding the Fourth Proportional to 349.78, 521.13 and 346.36

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Solution

The fourth proportional to 349.78, 521.13 and 346.36 is: 516.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.78 : 521.13 = 346.36 : x
  2. Step 2: Convert to fraction form
    349.78/521.13 = 346.36/x
  3. Step 3: Cross multiply
    349.78x = 521.13 × 346.36
  4. Step 4: Simplify right side
    349.78x = 180,498.59
  5. Step 5: Solve for x
    x = 180,498.59/349.78
  6. Step 6: Final answer
    x = 516.03

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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.