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Finding the Fourth Proportional to 613.15, 918.99 and 353.34

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Solution

The fourth proportional to 613.15, 918.99 and 353.34 is: 529.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.15 : 918.99 = 353.34 : x
  2. Step 2: Convert to fraction form
    613.15/918.99 = 353.34/x
  3. Step 3: Cross multiply
    613.15x = 918.99 × 353.34
  4. Step 4: Simplify right side
    613.15x = 324,715.93
  5. Step 5: Solve for x
    x = 324,715.93/613.15
  6. Step 6: Final answer
    x = 529.59

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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.