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Finding the Fourth Proportional to 353.72, 531.48 and 339.32

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Solution

The fourth proportional to 353.72, 531.48 and 339.32 is: 509.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.72 : 531.48 = 339.32 : x
  2. Step 2: Convert to fraction form
    353.72/531.48 = 339.32/x
  3. Step 3: Cross multiply
    353.72x = 531.48 × 339.32
  4. Step 4: Simplify right side
    353.72x = 180,341.79
  5. Step 5: Solve for x
    x = 180,341.79/353.72
  6. Step 6: Final answer
    x = 509.84

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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.