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Finding the Fourth Proportional to 339.10, 507.30 and 306.70

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Solution

The fourth proportional to 339.10, 507.30 and 306.70 is: 458.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.10 : 507.30 = 306.70 : x
  2. Step 2: Convert to fraction form
    339.10/507.30 = 306.70/x
  3. Step 3: Cross multiply
    339.10x = 507.30 × 306.70
  4. Step 4: Simplify right side
    339.10x = 155,588.91
  5. Step 5: Solve for x
    x = 155,588.91/339.10
  6. Step 6: Final answer
    x = 458.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.