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Finding the Fourth Proportional to 339.12, 507.60 and 275.04

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Solution

The fourth proportional to 339.12, 507.60 and 275.04 is: 411.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.12 : 507.60 = 275.04 : x
  2. Step 2: Convert to fraction form
    339.12/507.60 = 275.04/x
  3. Step 3: Cross multiply
    339.12x = 507.60 × 275.04
  4. Step 4: Simplify right side
    339.12x = 139,610.30
  5. Step 5: Solve for x
    x = 139,610.30/339.12
  6. Step 6: Final answer
    x = 411.68

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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.