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Finding the Fourth Proportional to 353.17, 528.60 and 319.49

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Solution

The fourth proportional to 353.17, 528.60 and 319.49 is: 478.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.17 : 528.60 = 319.49 : x
  2. Step 2: Convert to fraction form
    353.17/528.60 = 319.49/x
  3. Step 3: Cross multiply
    353.17x = 528.60 × 319.49
  4. Step 4: Simplify right side
    353.17x = 168,879.77
  5. Step 5: Solve for x
    x = 168,879.77/353.17
  6. Step 6: Final answer
    x = 478.19

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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.