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Finding the Fourth Proportional to 349.69, 521.48 and 306.56

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Solution

The fourth proportional to 349.69, 521.48 and 306.56 is: 457.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.69 : 521.48 = 306.56 : x
  2. Step 2: Convert to fraction form
    349.69/521.48 = 306.56/x
  3. Step 3: Cross multiply
    349.69x = 521.48 × 306.56
  4. Step 4: Simplify right side
    349.69x = 159,864.91
  5. Step 5: Solve for x
    x = 159,864.91/349.69
  6. Step 6: Final answer
    x = 457.16

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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.